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Decimal expansion of the volume of gyroelongated square pyramid with edge length 1.
2

%I #4 Mar 31 2012 12:38:37

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

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

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

%N Decimal expansion of the volume of gyroelongated square pyramid with edge length 1.

%C Gyroelongated square pyramid: 9 vertices, 20 edges, and 13 faces.

%H Wolfram Alpha, <a href="http://www.wolframalpha.com/input/?i=Johnson+solid+10">Johnson solid 10</a>

%F Digits of (sqrt(2)+2 sqrt(4+3 sqrt(2)))/6.

%e 1.19270224223223255906019842837725158155262551828862015707793142188822...

%t RealDigits[N[(Sqrt[2]+2*Sqrt[4+3*Sqrt[2]])/6,200]]

%Y Cf. A001622, A010527, A102208, A179290, A179292, A179294, A179449, A179450, A179451, A179452, A179552, A179553, A179554, A179587, A179588, A179589, A179590, A179591, A179592, A179593, A179637.

%K cons,nonn,easy

%O 1,3

%A _Vladimir Joseph Stephan Orlovsky_, Jul 21 2010