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A319883
Decimal expansion of the steradian solid angle subtended by one pentagonal facet of the icosidodecahedron.
3
7, 4, 7, 4, 4, 1, 7, 1, 8, 2, 0, 9, 1, 3, 3, 9, 6, 1, 8, 3, 9, 9, 5, 9, 4, 6, 5, 6, 6, 6, 3, 2, 0, 5, 6, 8, 0, 4, 4, 1, 0, 0, 5, 7, 1, 7, 4, 3, 0, 4, 8, 4, 0, 8, 5, 6, 7, 1, 9, 3, 1, 4, 7, 4, 4, 7, 0, 8, 1, 1, 1, 7, 6, 8, 5, 6, 0, 4, 0, 2
OFFSET
0,1
LINKS
Eric Weisstein's World of Mathematics, Icosidodecahedron
Eric Weisstein's World of Mathematics, Spherical Polygon
FORMULA
Equals 2*Pi - 5*arctan(2).
Equals (Pi - 5*A319881)/3.
EXAMPLE
0.74744171820913396183995946566632056804410057174304...
MATHEMATICA
RealDigits[2*Pi - 5*ArcTan[2], 10, 80][[1]]
CROSSREFS
Cf. A319881. Cuboctahedron: A236555, A236556.
Sequence in context: A160575 A194361 A153586 * A153186 A343628 A085469
KEYWORD
nonn,cons
AUTHOR
Bradley Klee, Sep 30 2018
STATUS
approved