A377995 - OEIS

A377995

Decimal expansion of the dihedral angle, in radians, between square and pentagonal faces in a (small) rhombicosidodecahedron.

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

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OFFSET

1,1

COMMENTS

Also the dihedral angle, in radians, between square and 10-gonal faces in a truncated icosidodecahedron (great rhombicosidodecahedron).

LINKS

Table of n, a(n) for n=1..90.

Eric Weisstein's World of Mathematics, Great Rhombicosidodecahedron.

Eric Weisstein's World of Mathematics, Small Rhombicosidodecahedron.

FORMULA

Equals arccos(-sqrt((5 + sqrt(5))/10)) = arccos(-sqrt(A242671)).

EXAMPLE