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Search: id:A153935
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A153935 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 4 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 2, 3, 8, 6, 19, 86, 201, 747, 4737, 13222, 67580, 644447, 2591663, 18812351, 265019022, 1467585490, 15658902928, 326360337439 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A070267 A056762 A069830 this_sequence A153944 A046652 A091681

Adjacent sequences: A153932 A153933 A153934 this_sequence A153936 A153937 A153938

KEYWORD

nonn

AUTHOR

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

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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