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Search: id:A153992
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A153992 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 10 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 4, 16, 64, 447, 3366, 48406, 708304, 19960973, 570218721, 31360806160, 1749984725579, 187910820807765, 20470104106684190, 4283194032962518137 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A001900 A113247 A138870 this_sequence A153995 A153998 A154001

Adjacent sequences: A153989 A153990 A153991 this_sequence A153993 A153994 A153995

KEYWORD

nonn

AUTHOR

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

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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