A153557 Number of planar n X n X n binary triangular grids with no more than 3 ones in any similarly oriented 4 X 4 X 4 subtriangle.

1, 2, 8, 42, 176, 1746, 27983, 630889, 18492283, 877780369, 63669637114, 6801320086494, 1063331866929514, 250365248652172910

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Crossrefs

Sequence in context: A153537 A153565 A153528 * A231103 A114204 A366238

Adjacent sequences: A153554 A153555 A153556 * A153558 A153559 A153560

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved