

A179290


Decimal expansion of length of edge of a regular icosahedron with radius of circumscribed sphere = 1.


24



1, 0, 5, 1, 4, 6, 2, 2, 2, 4, 2, 3, 8, 2, 6, 7, 2, 1, 2, 0, 5, 1, 3, 3, 8, 1, 6, 9, 6, 9, 5, 7, 5, 3, 2, 1, 4, 5, 7, 0, 9, 9, 5, 8, 6, 4, 4, 8, 6, 6, 8, 3, 5, 6, 3, 0, 5, 7, 8, 7, 1, 0, 4, 6, 4, 8, 2, 4, 2, 2, 2, 9, 2, 8, 0, 6, 4, 2, 8, 0, 3, 6, 7, 4, 3, 2, 6, 5, 2, 5, 7, 6, 6, 3, 1, 0, 5, 1, 4, 1, 9, 1, 3, 3, 9
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OFFSET

1,3


COMMENTS

Regular icosahedron: A three dimensional figure with 20 congruence equilateral triangle faces, 12 vertices, and 30 edges.


LINKS

Table of n, a(n) for n=1..105.
J. Brandts, S. Korotov, M. Krizek, J. Solc, On nonobtuse simplicial partitions, Siam Rev. 51 (2) (2009) 317335
"Dr. Math", Regular Polyhedra: Formulas
Wikipedia, Icosahedron
Eric Weisstein's World of Mathematics, Icosahedron


FORMULA

Digits of sqrt(5010*sqrt(5))/5.


EXAMPLE

1.051462224238267212051338169695753214570995864486683563057871046482422...


MATHEMATICA

R=1; RealDigits[N[(Sqrt[5010*Sqrt[5]]/5)*R, 175]]


CROSSREFS

Cf. A010527, A102208.
Sequence in context: A200022 A216157 A216851 * A167864 A232809 A011301
Adjacent sequences: A179287 A179288 A179289 * A179291 A179292 A179293


KEYWORD

nonn,cons,easy


AUTHOR

Vladimir Joseph Stephan Orlovsky, Jul 09 2010


EXTENSIONS

Partially rewritten by Charles R Greathouse IV, Feb 02 2011.


STATUS

approved



