A179637 - OEIS

%I #6 Mar 31 2012 12:38:37

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

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

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

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

%C Pentagonal rotunda: 20 vertices, 35 edges, and 17 faces.

%H Wolfram Alpha, <a href="http://www.wolframalpha.com/input/?i=Johnson+solid+6">Johnson solid 6</a>

%F Digits of sqrt(5*(145+58*sqrt(5)+2*sqrt(30*(65+29*sqrt(5)))))/2.

%e 22.3472002653941282767984141581886130738180135134316226129799763167102...

%t RealDigits[N[Sqrt[5*(145+58*Sqrt[5]+2*Sqrt[30*(65+29*Sqrt[5])])]/2,200]]

%Y Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449-A179452, A179552-A179554, A179587-A179593.

%K cons,nonn,easy

%O 2,1

%A _Vladimir Joseph Stephan Orlovsky_, Jul 21 2010

%E Offset corrected by _R. J. Mathar_, Aug 15 2010