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Search: id:A153991
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A153991 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 10 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 2, 4, 16, 26, 107, 826, 3054, 23077, 376116, 2691940, 40600759, 1272412451, 17792826487, 517514558991, 31410446834698 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A122598 A087783 A106241 this_sequence A153994 A102864 A153997

Adjacent sequences: A153988 A153989 A153990 this_sequence A153992 A153993 A153994

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 04 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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