A153549 Number of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 2 X 2 X 2 subtriangle.

1, 2, 7, 45, 523, 11039, 422661, 29363700, 3701326718, 846522284413, 351279112544918, 264484064187115475, 361309917557640153256, 895557464235637917670130, 4027543439600489230428646003

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Crossrefs

Sequence in context: A098637 A162045 A326878 * A348880 A079491 A266908

Adjacent sequences: A153546 A153547 A153548 * A153550 A153551 A153552

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved