A153525 Number of planar n X n X n binary triangular grids with no more than 4 ones in any 3 X 3 X 3 subtriangle.

1, 2, 8, 57, 775, 19641, 921690, 80625050, 13124722225, 3973078785189, 2237747461311054, 2344793549245488048, 4570701601942028573011, 16575255948705837833863791, 111824026459437969673639006613

Offset

0,2

Links

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

Crossrefs

Sequence in context: A133686 A369193 A369192 * A153553 A334617 A191481

Adjacent sequences: A153522 A153523 A153524 * A153526 A153527 A153528

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved