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Search: id:A153938
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A153938 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 3 X 3 X 3 subtriangle. +0
1
1, 2, 2, 3, 15, 24, 95, 901, 2926, 22625, 415047, 2632895, 39794767, 1442122393, 17977314936, 535815289761, 38169625321927, 935805308861487, 54839755115620718, 7680772354691458379, 370282826884218784372 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A019515 A094352 A073828 this_sequence A060790 A109843 A164022

Adjacent sequences: A153935 A153936 A153937 this_sequence A153939 A153940 A153941

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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