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Search: id:A153908
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A153908 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 2 X 2 X 2 subtriangle. +0
1
1, 2, 1, 2, 13, 14, 44, 452, 799, 4626, 86710, 273752, 2781435, 91537826, 508729354, 9157300668, 533484637064, 5243172893020, 166735484693868, 17161483714082216, 298035643554185774, 16752470174524734906, 3047662126271875592300 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A069238 A165313 A052579 this_sequence A048296 A016542 A007402

Adjacent sequences: A153905 A153906 A153907 this_sequence A153909 A153910 A153911

KEYWORD

nonn

AUTHOR

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

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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