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 Catalan

 http://functions.wolfram.com/02.07.26.0008.01

 Input Form

 Catalan == Pi/24 - (Pi/2) Log[Glaisher] + 4 Pi Derivative[1, 0][Zeta][-1, 1/4]

 Standard Form

 Cell[BoxData[RowBox[List["Catalan", "\[Equal]", RowBox[List[FractionBox["\[Pi]", "24"], "-", RowBox[List[FractionBox["\[Pi]", "2"], " ", RowBox[List["Log", "[", "Glaisher", "]"]]]], "+", RowBox[List["4", " ", "\[Pi]", " ", RowBox[List[SuperscriptBox["Zeta", TagBox[RowBox[List["(", RowBox[List["1", ",", "0"]], ")"]], Derivative], Rule[MultilineFunction, None]], "[", RowBox[List[RowBox[List["-", "1"]], ",", FractionBox["1", "4"]]], "]"]]]]]]]]]]

 MathML Form

 C TagBox["C", Function[Catalan]] π 24 - π 2 log ( Glaisher ) + 4 π ζ ( 1 , 0 ) TagBox[RowBox[List["(", RowBox[List["1", ",", "0"]], ")"]], Derivative] ( - 1 , 1 4 ) Catalan 24 -1 -1 2 -1 Glaisher 4 1 0 Zeta -1 1 4 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", "Catalan", "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["\[Pi]", "24"], "-", RowBox[List[FractionBox["1", "2"], " ", "\[Pi]", " ", RowBox[List["Log", "[", "Glaisher", "]"]]]], "+", RowBox[List["4", " ", "\[Pi]", " ", RowBox[List[SuperscriptBox["Zeta", TagBox[RowBox[List["(", RowBox[List["1", ",", "0"]], ")"]], Derivative], Rule[MultilineFunction, None]], "[", RowBox[List[RowBox[List["-", "1"]], ",", FractionBox["1", "4"]]], "]"]]]]]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29