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A153561
Number of planar n X n X n binary triangular grids with no more than 7 ones in any similarly oriented 4 X 4 X 4 subtriangle.
0
1, 2, 8, 64, 968, 28794, 1676720, 190753044, 42330133212, 18347290219443, 15531600187066091, 25676352051100036281, 82891258436313124567758, 522584330002597542177222679
OFFSET
0,2
CROSSREFS
Sequence in context: A153541 A153569 A153532 * A192413 A194456 A153542
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2009
STATUS
approved