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A153523 Number of planar n X n X n binary triangular grids with no more than 2 ones in any 3 X 3 X 3 subtriangle. 0
1, 2, 7, 22, 132, 1204, 13768, 244089, 6352095, 232890454, 12491887452, 974287563383, 109587446419665, 17874622451841230, 4227153018169110373, 1447295404720506832342, 717895790307321893024403 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

CROSSREFS

Sequence in context: A004300 A049369 A308548 * A153551 A125285 A170870

Adjacent sequences:  A153520 A153521 A153522 * A153524 A153525 A153526

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2009

STATUS

approved

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Last modified July 21 00:49 EDT 2019. Contains 325189 sequences. (Running on oeis4.)