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Search: id:A153912
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A153912 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 3 X 3 X 3 subtriangle. +0
1
1, 2, 28586, 195384, 2093119, 20428045, 317866834, 4492197059, 100898111116, 2073132268053, 67489432729042, 2005814360075163, 94662265499676795, 4075394325398277635, 278524123602639198495, 17377022786797473216927 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A132942 A131558 A133857 this_sequence A047076 A030462 A001377

Adjacent sequences: A153909 A153910 A153911 this_sequence A153913 A153914 A153915

KEYWORD

nonn

AUTHOR

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

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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