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A153532
Number of planar n X n X n binary triangular grids with no more than 7 ones in any 4 X 4 X 4 subtriangle.
0
1, 2, 8, 64, 968, 28776, 1665065, 186775857, 40576650722, 17097010684006, 13970781527118884, 22134691041539759364, 67990421653342264227292
OFFSET
0,2
CROSSREFS
Sequence in context: A085658 A153541 A153569 * A153561 A192413 A194456
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2009
STATUS
approved