A153524 Number of planar n X n X n binary triangular grids with no more than 3 ones in any 3 X 3 X 3 subtriangle.

1, 2, 8, 42, 418, 7166, 196648, 9262421, 735124501, 97462705054, 21772941967902, 8177116027167826, 5158458258244584078, 5470968994479723869739, 9752808741716616515809575

Offset

0,2

Links

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

Crossrefs

Sequence in context: A002856 A093461 A191994 * A153552 A295199 A191479

Adjacent sequences: A153521 A153522 A153523 * A153525 A153526 A153527

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved