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A154004
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 14 ones in any 5 X 5 X 5 subtriangle.
0
1, 2, 4, 16, 64, 511, 4087, 65266, 1043960, 33294340, 1064788451, 67924859273, 4344369237533, 554246140585577, 70893824733656698, 18088030701247974490, 4627052123343980555078, 2360992279682367231113937
OFFSET
0,2
CROSSREFS
Sequence in context: A153995 A153998 A154001 * A338364 A060656 A271234
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved