E^2 == 7 + ContinueFraction[ {1, KroneckerDelta[Mod[k, 5], 1] (3 Ceiling[k/5] - 1) + KroneckerDelta[Mod[k, 5], 2] 1 + KroneckerDelta[Mod[k, 5], 3] 1 + KroneckerDelta[Mod[k, 5], 4] 3 Ceiling[k/5] + KroneckerDelta[Mod[k, 5], 0] 6 (2 Ceiling[k/5] + 1)}, {k, 1, Infinity}]

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<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <msup> <mi> &#8519; </mi> <mn> 2 </mn> </msup> <mo> &#10869; </mo> <mrow> <mn> 7 </mn> <mo> + </mo> <msubsup> <mrow> <msub> <mi> &#922; </mi> <mi> k </mi> </msub> <mo> ( </mo> <mrow> <mn> 1 </mn> <mo> , </mo> <mrow> <mrow> <mn> 6 </mn> <mo> &#8290; </mo> <mrow> <mo> ( </mo> <mrow> <mrow> <mn> 2 </mn> <mo> &#8290; </mo> <mrow> <mo> &#8968; </mo> <mfrac> <mi> k </mi> <mn> 5 </mn> </mfrac> <mo> &#8969; </mo> </mrow> </mrow> <mo> + </mo> <mn> 1 </mn> </mrow> <mo> ) </mo> </mrow> <mo> &#8290; </mo> <msub> <semantics> <mi> &#948; </mi> <annotation-xml encoding='MathML-Content'> <ci> KroneckerDelta </ci> </annotation-xml> </semantics> <mrow> <semantics> <mrow> <mi> k </mi> <mo> &#8290; </mo> <mi> mod </mi> <mo> &#8290; </mo> <mn> 5 </mn> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> </annotation-xml> </semantics> <mo> , </mo> <mn> 0 </mn> </mrow> </msub> </mrow> <mo> + </mo> <mrow> <mrow> <mo> ( </mo> <mrow> <mrow> <mn> 3 </mn> <mo> &#8290; </mo> <mrow> <mo> &#8968; </mo> <mfrac> <mi> k </mi> <mn> 5 </mn> </mfrac> <mo> &#8969; </mo> </mrow> </mrow> <mo> - </mo> <mn> 1 </mn> </mrow> <mo> ) </mo> </mrow> <mo> &#8290; </mo> <msub> <semantics> <mi> &#948; </mi> <annotation-xml encoding='MathML-Content'> <ci> KroneckerDelta </ci> </annotation-xml> </semantics> <mrow> <semantics> <mrow> <mi> k </mi> <mo> &#8290; </mo> <mi> mod </mi> <mo> &#8290; </mo> <mn> 5 </mn> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> </annotation-xml> </semantics> <mo> , </mo> <mn> 1 </mn> </mrow> </msub> </mrow> <mo> + </mo> <mrow> <mn> 1 </mn> <mo> &#8290; </mo> <msub> <semantics> <mi> &#948; </mi> <annotation-xml encoding='MathML-Content'> <ci> KroneckerDelta </ci> </annotation-xml> </semantics> <mrow> <semantics> <mrow> <mi> k </mi> <mo> &#8290; </mo> <mi> mod </mi> <mo> &#8290; </mo> <mn> 5 </mn> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> </annotation-xml> </semantics> <mo> , </mo> <mn> 2 </mn> </mrow> </msub> </mrow> <mo> + </mo> <mrow> <mn> 1 </mn> <mo> &#8290; </mo> <msub> <semantics> <mi> &#948; </mi> <annotation-xml encoding='MathML-Content'> <ci> KroneckerDelta </ci> </annotation-xml> </semantics> <mrow> <semantics> <mrow> <mi> k </mi> <mo> &#8290; </mo> <mi> mod </mi> <mo> &#8290; </mo> <mn> 5 </mn> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> </annotation-xml> </semantics> <mo> , </mo> <mn> 3 </mn> </mrow> </msub> </mrow> <mo> + </mo> <mrow> <mn> 3 </mn> <mo> &#8290; </mo> <mrow> <mo> &#8968; </mo> <mfrac> <mi> k </mi> <mn> 5 </mn> </mfrac> <mo> &#8969; </mo> </mrow> <mo> &#8290; </mo> <msub> <semantics> <mi> &#948; </mi> <annotation-xml encoding='MathML-Content'> <ci> KroneckerDelta </ci> </annotation-xml> </semantics> <mrow> <semantics> <mrow> <mi> k </mi> <mo> &#8290; </mo> <mi> mod </mi> <mo> &#8290; </mo> <mn> 5 </mn> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> </annotation-xml> </semantics> <mo> , </mo> <mn> 4 </mn> </mrow> </msub> </mrow> </mrow> </mrow> <mo> ) </mo> </mrow> <mn> 1 </mn> <mi> &#8734; </mi> </msubsup> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <power /> <exponentiale /> <cn type='integer'> 2 </cn> </apply> <apply> <plus /> <cn type='integer'> 7 </cn> <apply> <power /> <apply> <ci> Subscript </ci> <apply> <apply> <ci> Subscript </ci> <ci> &#922; </ci> <ci> k </ci> </apply> <cn type='integer'> 1 </cn> <apply> <plus /> <apply> <times /> <cn type='integer'> 6 </cn> <apply> <plus /> <apply> <times /> <cn type='integer'> 2 </cn> <apply> <ceiling /> <apply> <times /> <ci> k </ci> <apply> <power /> <cn type='integer'> 5 </cn> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </apply> <cn type='integer'> 1 </cn> </apply> <apply> <ci> KroneckerDelta </ci> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> <cn type='integer'> 0 </cn> </apply> </apply> <apply> <times /> <apply> <plus /> <apply> <times /> <cn type='integer'> 3 </cn> <apply> <ceiling /> <apply> <times /> <ci> k </ci> <apply> <power /> <cn type='integer'> 5 </cn> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </apply> <cn type='integer'> -1 </cn> </apply> <apply> <ci> KroneckerDelta </ci> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> <cn type='integer'> 1 </cn> </apply> </apply> <apply> <times /> <cn type='integer'> 1 </cn> <apply> <ci> KroneckerDelta </ci> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> <cn type='integer'> 2 </cn> </apply> </apply> <apply> <times /> <cn type='integer'> 1 </cn> <apply> <ci> KroneckerDelta </ci> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> <cn type='integer'> 3 </cn> </apply> </apply> <apply> <times /> <cn type='integer'> 3 </cn> <apply> <ceiling /> <apply> <times /> <ci> k </ci> <apply> <power /> <cn type='integer'> 5 </cn> <cn type='integer'> -1 </cn> </apply> </apply> </apply> <apply> <ci> KroneckerDelta </ci> <apply> <rem /> <ci> $CellContext`k </ci> <cn type='integer'> 5 </cn> </apply> <cn type='integer'> 4 </cn> </apply> </apply> </apply> </apply> <cn type='integer'> 1 </cn> </apply> <infinity /> </apply> </apply> </apply> </annotation-xml> </semantics> </math>

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2002-12-18