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Search: id:A153911
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A153911 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 3 X 3 X 3 subtriangle. +0
1
1, 2, 412, 3309, 6170, 28173, 363650, 995263, 7017397, 125707566, 496907299, 5084773943, 131364083278, 749724226722, 10945594000512, 414717014027555, 3429998068477278, 72977331677447737, 3992874305065142952 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A092701 A067827 A070269 this_sequence A080392 A154541 A119120

Adjacent sequences: A153908 A153909 A153910 this_sequence A153912 A153913 A153914

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 03 2009

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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