The On-Line Encyclopedia of Integer Sequences (OEIS)

A378388 revision #5

A378388

Decimal expansion of the surface area of a tetrakis hexahedron with unit shorter edge length.

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

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OFFSET

2,3

COMMENTS

The tetrakis hexahedron is the dual polyhedron of the truncated octahedron.

LINKS

Table of n, a(n) for n=2..91.

Paolo Xausa, Table of n, a(n) for n = 2..10000

Eric Weisstein's World of Mathematics, Tetrakis Hexahedron.

FORMULA

Equals (16/3)*sqrt(5) = (16/3)*A002163 = 16*A208899.

EXAMPLE