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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. 0
1, 2, 8, 42, 176, 1746, 27983, 630889, 18492283, 877780369, 63669637114, 6801320086494, 1063331866929514, 250365248652172910 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A153537 A153565 A153528 * A231103 A114204 A129277

Adjacent sequences:  A153554 A153555 A153556 * A153558 A153559 A153560

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 01 2009

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)