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Search: id:A154000
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A154000 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 13 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 2, 4, 16, 31, 126, 1009, 3933, 31428, 512187, 4017316, 64213559, 2090787507, 32776879657, 1046731134966, 68125822829775, 2134091162950790, 136215005250379929, 17716724971218816648, 1109196056459852373561 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A153994 A102864 A153997 this_sequence A154003 A009542 A032318

Adjacent sequences: A153997 A153998 A153999 this_sequence A154001 A154002 A154003

KEYWORD

nonn

AUTHOR

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

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Last modified December 20 16:13 EST 2009. Contains 171081 sequences.

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