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   http://functions.wolfram.com/10.01.03.0056.01
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    Zeta[3] == (-(2/3)) Pi^2 (6 Log[Glaisher] + Log[2 Pi] - 12 PolyGamma[-4, 1]) 
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   Cell[BoxData[RowBox[List[RowBox[List["Zeta", "[", "3", "]"]], "\[Equal]", RowBox[List[RowBox[List["-", FractionBox["2", "3"]]], " ", SuperscriptBox["\[Pi]", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List["6", " ", RowBox[List["Log", "[", "Glaisher", "]"]]]], "+", RowBox[List["Log", "[", RowBox[List["2", " ", "\[Pi]"]], "]"]], "-", RowBox[List["12", " ", RowBox[List["PolyGamma", "[", RowBox[List[RowBox[List["-", "4"]], ",", "1"]], "]"]]]]]], ")"]]]]]]]] 
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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>  <semantics>  <mrow>  <mi> ζ </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mn> 3 </mn>  <mo> ) </mo>  </mrow>  <annotation encoding='Mathematica'> TagBox[RowBox[List["\[Zeta]", "(", TagBox["3", Zeta, Rule[Editable, True], Rule[Selectable, True]], ")"]], InterpretTemplate[Function[BoxForm`e$, Zeta[BoxForm`e$]]], Rule[Editable, False], Rule[Selectable, False]] </annotation>  </semantics>  <mo>  </mo>  <mrow>  <mrow>  <mo> - </mo>  <mfrac>  <mn> 2 </mn>  <mn> 3 </mn>  </mfrac>  </mrow>  <mo> ⁢ </mo>  <msup>  <mi> π </mi>  <mn> 2 </mn>  </msup>  <mo> ⁢ </mo>  <mrow>  <mo> ( </mo>  <mrow>  <mrow>  <mn> 6 </mn>  <mo> ⁢ </mo>  <mrow>  <mi> log </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <semantics>  <mi> A </mi>  <annotation encoding='Mathematica'> TagBox["A", Function[List[], Glaisher]] </annotation>  </semantics>  <mo> ) </mo>  </mrow>  </mrow>  <mo> + </mo>  <mrow>  <mi> log </mi>  <mo> ⁡ </mo>  <mo> ( </mo>  <mrow>  <mn> 2 </mn>  <mo> ⁢ </mo>  <mi> π </mi>  </mrow>  <mo> ) </mo>  </mrow>  <mo> - </mo>  <mrow>  <mn> 12 </mn>  <mo> ⁢ </mo>  <mrow>  <msup>  <semantics>  <mi> ψ </mi>  <annotation encoding='Mathematica'> TagBox["\[Psi]", PolyGamma] </annotation>  </semantics>  <mrow>  <mo> ( </mo>  <mrow>  <mo> - </mo>  <mn> 4 </mn>  </mrow>  <mo> ) </mo>  </mrow>  </msup>  <mo> ( </mo>  <mn> 1 </mn>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <mo> ) </mo>  </mrow>  </mrow>  </mrow>  <annotation-xml encoding='MathML-Content'>  <apply>  <eq />  <apply>  <ci> Zeta </ci>  <cn type='integer'> 3 </cn>  </apply>  <apply>  <times />  <apply>  <times />  <cn type='integer'> -1 </cn>  <cn type='rational'> 2 <sep /> 3 </cn>  </apply>  <apply>  <power />  <pi />  <cn type='integer'> 2 </cn>  </apply>  <apply>  <plus />  <apply>  <times />  <cn type='integer'> 6 </cn>  <apply>  <ln />  <ci> Glaisher </ci>  </apply>  </apply>  <apply>  <ln />  <apply>  <times />  <cn type='integer'> 2 </cn>  <pi />  </apply>  </apply>  <apply>  <times />  <cn type='integer'> -1 </cn>  <apply>  <times />  <cn type='integer'> 12 </cn>  <apply>  <ci> PolyGamma </ci>  <cn type='integer'> -4 </cn>  <cn type='integer'> 1 </cn>  </apply>  </apply>  </apply>  </apply>  </apply>  </apply>  </annotation-xml>  </semantics>  </math> 
   
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  | Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Zeta", "[", "3", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", "3"], " ", RowBox[List["(", RowBox[List["-", "2"]], ")"]], " ", SuperscriptBox["\[Pi]", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List["6", " ", RowBox[List["Log", "[", "Glaisher", "]"]]]], "+", RowBox[List["Log", "[", RowBox[List["2", " ", "\[Pi]"]], "]"]], "-", RowBox[List["12", " ", RowBox[List["PolyGamma", "[", RowBox[List[RowBox[List["-", "4"]], ",", "1"]], "]"]]]]]], ")"]]]]]]]]  |  
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   Date Added to functions.wolfram.com (modification date)
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