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A153526
Number of planar n X n X n binary triangular grids with no more than 5 ones in any 3 X 3 X 3 subtriangle.
0
1, 2, 8, 63, 981, 30024, 1807250, 213927268, 49795084180, 22791997973462, 20514123247423935, 36307660199677051280, 126362515904909451106459, 864794574138352010221407430, 11638106971975324518132459725847
OFFSET
0,2
CROSSREFS
Sequence in context: A193195 A098000 A084279 * A153554 A139018 A110708
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2009
STATUS
approved