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http://functions.wolfram.com/06.41.16.0003.01
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CatalanNumber[z + n] == ((2^(2 n) Pochhammer[1/2 + z, n])/
Pochhammer[2 + z, n]) CatalanNumber[z] /; Element[n, Integers]
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Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["CatalanNumber", "[", RowBox[List["z", "+", "n"]], "]"]], "\[Equal]", RowBox[List[FractionBox[RowBox[List[SuperscriptBox["2", RowBox[List["2", " ", "n"]]], " ", RowBox[List["Pochhammer", "[", RowBox[List[RowBox[List[FractionBox["1", "2"], "+", "z"]], ",", "n"]], "]"]]]], RowBox[List["Pochhammer", "[", RowBox[List[RowBox[List["2", "+", "z"]], ",", "n"]], "]"]]], RowBox[List["CatalanNumber", "[", "z", "]"]]]]]], "/;", RowBox[List["n", "\[Element]", "Integers"]]]]]]
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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> <mrow> <msub> <semantics> <mi> C </mi> <annotation encoding='Mathematica'> TagBox["C", CatalanNumber] </annotation> </semantics> <mrow> <mi> n </mi> <mo> + </mo> <mi> z </mi> </mrow> </msub> <mo>  </mo> <mrow> <mfrac> <mrow> <msup> <mn> 2 </mn> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mi> n </mi> </mrow> </msup> <mo> ⁢ </mo> <semantics> <msub> <mrow> <mo> ( </mo> <mrow> <mi> z </mi> <mo> + </mo> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> </mrow> <mo> ) </mo> </mrow> <mi> n </mi> </msub> <annotation encoding='Mathematica'> TagBox[SubscriptBox[RowBox[List["(", RowBox[List["z", "+", FractionBox["1", "2"]]], ")"]], "n"], Pochhammer] </annotation> </semantics> </mrow> <semantics> <msub> <mrow> <mo> ( </mo> <mrow> <mi> z </mi> <mo> + </mo> <mn> 2 </mn> </mrow> <mo> ) </mo> </mrow> <mi> n </mi> </msub> <annotation encoding='Mathematica'> TagBox[SubscriptBox[RowBox[List["(", RowBox[List["z", "+", "2"]], ")"]], "n"], Pochhammer] </annotation> </semantics> </mfrac> <mo> ⁢ </mo> <msub> <semantics> <mi> C </mi> <annotation encoding='Mathematica'> TagBox["C", CatalanNumber] </annotation> </semantics> <mi> z </mi> </msub> </mrow> </mrow> <mo> /; </mo> <mrow> <mi> n </mi> <mo> ∈ </mo> <semantics> <mi> ℤ </mi> <annotation encoding='Mathematica'> TagBox["\[DoubleStruckCapitalZ]", Function[List[], Integers]] </annotation> </semantics> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <ci> Condition </ci> <apply> <eq /> <apply> <ci> CatalanNumber </ci> <apply> <plus /> <ci> n </ci> <ci> z </ci> </apply> </apply> <apply> <times /> <apply> <times /> <apply> <power /> <cn type='integer'> 2 </cn> <apply> <times /> <cn type='integer'> 2 </cn> <ci> n </ci> </apply> </apply> <apply> <ci> Pochhammer </ci> <apply> <plus /> <ci> z </ci> <cn type='rational'> 1 <sep /> 2 </cn> </apply> <ci> n </ci> </apply> <apply> <power /> <apply> <ci> Pochhammer </ci> <apply> <plus /> <ci> z </ci> <cn type='integer'> 2 </cn> </apply> <ci> n </ci> </apply> <cn type='integer'> -1 </cn> </apply> </apply> <apply> <ci> CatalanNumber </ci> <ci> z </ci> </apply> </apply> </apply> <apply> <in /> <ci> n </ci> <integers /> </apply> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["CatalanNumber", "[", RowBox[List["z_", "+", "n_"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox[RowBox[List[RowBox[List["(", RowBox[List[SuperscriptBox["2", RowBox[List["2", " ", "n"]]], " ", RowBox[List["Pochhammer", "[", RowBox[List[RowBox[List[FractionBox["1", "2"], "+", "z"]], ",", "n"]], "]"]]]], ")"]], " ", RowBox[List["CatalanNumber", "[", "z", "]"]]]], RowBox[List["Pochhammer", "[", RowBox[List[RowBox[List["2", "+", "z"]], ",", "n"]], "]"]]], "/;", RowBox[List["n", "\[Element]", "Integers"]]]]]]]] |
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Date Added to functions.wolfram.com (modification date)
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