A195698 - OEIS

A195698

Decimal expansion of arccos(-sqrt(1/3)).

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

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OFFSET

1,1

COMMENTS

Dihedral angle between mixed type faces of the truncated octahedron. - R. J. Mathar, Mar 24 2012

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..5000

Wikipedia, Truncated Octahedron.

Index entries for transcendental numbers

FORMULA

Equals Pi - arcsin(sqrt(2/3)) = Pi - arctan(sqrt(2)). - Amiram Eldar, Jul 08 2023

EXAMPLE