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A236557 Vertex solid angle (steradians) in a regular icosahedron. 4
2, 6, 3, 4, 5, 4, 7, 0, 2, 6, 0, 4, 4, 7, 5, 4, 6, 5, 9, 6, 5, 1, 3, 0, 3, 4, 6, 7, 4, 9, 2, 4, 0, 2, 2, 9, 1, 4, 1, 1, 8, 0, 9, 2, 2, 8, 5, 1, 1, 6, 4, 3, 1, 8, 8, 4, 0, 5, 1, 4, 1, 7, 2, 7, 3, 0, 6, 5, 3, 8, 3, 1, 4, 2, 3, 8, 5, 8, 2, 3, 0, 3, 2, 7, 8, 6, 5, 2, 6, 1, 1, 5, 8, 6, 8, 6, 6, 6, 3, 4, 9, 2, 3, 8, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Stanislav Sykora, Table of n, a(n) for n = 1..2000

Wikipedia, Platonic solid

FORMULA

2*Pi - 5*arcsin(2/3).

EXAMPLE

2.6345470260447546596513034674924022914118092285116431884051417273...

PROG

(PARI) 2*Pi-5*asin(2/3)

CROSSREFS

Cf. Analogs: A236555 (tetrahedron), A236556 (octahedron), A019669 (cube), A236558 (dodecahedron).

Sequence in context: A066098 A123733 A261069 * A262943 A163892 A130108

Adjacent sequences:  A236554 A236555 A236556 * A236558 A236559 A236560

KEYWORD

nonn,cons,easy

AUTHOR

Stanislav Sykora, Jan 28 2014

STATUS

approved

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Last modified June 27 17:44 EDT 2017. Contains 288790 sequences.