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A319881 Decimal expansion of the steradian solid angle subtended by one triangular facet of the icosidodecahedron. 3
1, 7, 9, 8, 5, 3, 4, 9, 9, 7, 9, 2, 4, 7, 8, 2, 7, 0, 5, 8, 8, 5, 5, 2, 9, 9, 7, 2, 5, 6, 1, 0, 8, 2, 3, 6, 0, 1, 2, 9, 7, 3, 5, 3, 6, 8, 2, 9, 1, 9, 2, 1, 1, 9, 0, 5, 4, 6, 7, 3, 0, 2, 9, 9, 9, 3, 3, 1, 4, 6, 1, 0, 6, 4, 5, 8, 7, 9, 3, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Eric Weisstein's World of Mathematics, Icosidodecahedron
Eric Weisstein's World of Mathematics, Spherical Polygon
FORMULA
Equals 3*arctan(2) - Pi.
Equals (Pi - 3*A319883)/5.
EXAMPLE
0.17985349979247827058855299725610823601297353682919...
MATHEMATICA
RealDigits[3*ArcTan[2] - Pi, 10, 80][[1]]
PROG
(PARI) 3*atan(2)-Pi \\ Altug Alkan, Oct 03 2018
CROSSREFS
Cf. A319883. Cuboctahedron: A236555, A236556.
Sequence in context: A228049 A154943 A126041 * A021560 A197516 A019862
KEYWORD
nonn,cons
AUTHOR
Bradley Klee, Sep 30 2018
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)