%I #6 Aug 21 2023 10:38:12

%S 3,8,8,5,5,4,0,9,1,0,0,5,0,0,6,3,5,3,9,6,6,8,3,1,9,9,0,4,2,7,0,9,5,0,

%T 0,5,8,0,8,5,8,8,0,7,3,7,2,7,3,1,7,4,1,1,4,2,7,6,8,5,3,4,3,1,3,3,8,7,

%U 8,5,2,6,3,3,4,4,9,6,6,2,7,7,6,8,3,8,7,3,9,7,4,8,3,4,1,4,8,4,6,0,0,8,8,4,0

%N Decimal expansion of the surface area of pentagonal pyramid with edge length 1.

%C Pentagonal pyramid: 6 faces, 6 vertices, and 10 edges.

%H Wolfram Alpha, <a href="http://www.wolframalpha.com/input/?i=Johnson+solid+2">Johnson solid 2</a>

%H <a href="/index/Al#algebraic_08">Index entries for algebraic numbers, degree 8</a>

%F Digits of sqrt(5/2*(10+sqrt(5)+sqrt(75+30sqrt(5))))/2.

%e 3.885540910050063539668319904270950058085880737273174114276853431338785...

%t RealDigits[N[Sqrt[5/2*(10+Sqrt[5]+Sqrt[75+30*Sqrt[5]])]/2,200]]

%Y Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449, A179450, A179451, A179452, A179552.

%K nonn,cons,easy

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Jul 19 2010