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A153945
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 5 X 5 X 5 subtriangle.
0
1, 2, 4, 15, 38, 116, 499, 3634, 26242, 291832, 2965112, 51213790, 844607038, 23147940890, 598064925200, 25057845860011, 1027607776126888
OFFSET
0,2
CROSSREFS
Sequence in context: A181442 A007122 A005219 * A153942 A055466 A342957
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2009
STATUS
approved