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Search: id:A154001
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A154001 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 13 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 4, 16, 64, 508, 4054, 64383, 1024957, 32457661, 1032121857, 65351102113, 4153964152453, 525755086303623, 66797889955402370, 16898128960552112680, 4291148950249485286442, 2169726567052465643085463 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A153992 A153995 A153998 this_sequence A154004 A060656 A061286

Adjacent sequences: A153998 A153999 A154000 this_sequence A154002 A154003 A154004

KEYWORD

nonn

AUTHOR

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

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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