A153522 Number of planar n X n X n binary triangular grids with no more than 2 ones in any 2 X 2 X 2 subtriangle.

1, 2, 7, 44, 487, 9548, 330644, 20241284, 2189838823, 418717329192, 141498666489433, 84510319691113604, 89205606502160918487, 166417820194039911511676, 548697154280844534323051836

Offset

0,2

Links

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

Crossrefs

Sequence in context: A158257 A348857 A172389 * A355109 A278295 A356613

Adjacent sequences: A153519 A153520 A153521 * A153523 A153524 A153525

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved