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 Fibonacci

 http://functions.wolfram.com/04.11.02.0001.01

 Input Form

 Fibonacci[\[Nu]] == (GoldenRatio^\[Nu] - Cos[\[Nu] Pi]/GoldenRatio^\[Nu])/ Sqrt[5]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Fibonacci", "[", "\[Nu]", "]"]], "\[Equal]", FractionBox[RowBox[List[SuperscriptBox["GoldenRatio", "\[Nu]"], "-", RowBox[List[RowBox[List["Cos", "[", RowBox[List["\[Nu]", " ", "\[Pi]"]], "]"]], " ", SuperscriptBox["GoldenRatio", RowBox[List["-", "\[Nu]"]]]]]]], SqrtBox["5"]]]]]]

 MathML Form

 F TagBox["F", Fibonacci] ν ϕ TagBox["\[Phi]", Function[List[], GoldenRatio]] ν - cos ( ν π ) ϕ TagBox["\[Phi]", Function[List[], GoldenRatio]] - ν 5 Fibonacci ν GoldenRatio ν -1 ν GoldenRatio -1 ν 5 1 2 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Fibonacci", "[", "\[Nu]_", "]"]], "]"]], "\[RuleDelayed]", FractionBox[RowBox[List[SuperscriptBox["GoldenRatio", "\[Nu]"], "-", RowBox[List[RowBox[List["Cos", "[", RowBox[List["\[Nu]", " ", "\[Pi]"]], "]"]], " ", SuperscriptBox["GoldenRatio", RowBox[List["-", "\[Nu]"]]]]]]], SqrtBox["5"]]]]]]

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

 2001-10-29