A153526 Number of planar n X n X n binary triangular grids with no more than 5 ones in any 3 X 3 X 3 subtriangle.

1, 2, 8, 63, 981, 30024, 1807250, 213927268, 49795084180, 22791997973462, 20514123247423935, 36307660199677051280, 126362515904909451106459, 864794574138352010221407430, 11638106971975324518132459725847

Offset

0,2

Links

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

Crossrefs

Sequence in context: A193195 A098000 A084279 * A153554 A139018 A110708

Adjacent sequences: A153523 A153524 A153525 * A153527 A153528 A153529

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved