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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. 0
1, 2, 7, 44, 487, 9548, 330644, 20241284, 2189838823, 418717329192, 141498666489433, 84510319691113604, 89205606502160918487, 166417820194039911511676, 548697154280844534323051836 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A001046 A158257 A172389 * A278295 A107354 A006118

Adjacent sequences:  A153519 A153520 A153521 * A153523 A153524 A153525

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2009

STATUS

approved

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Last modified July 23 11:44 EDT 2019. Contains 325254 sequences. (Running on oeis4.)