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A153944
Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 5 X 5 X 5 subtriangle.
0
1, 2, 2, 3, 8, 6, 28, 164, 366, 1829, 16995, 53701, 369189, 5605587, 28526549, 299788077, 7021649770, 53533022280
OFFSET
0,2
CROSSREFS
Sequence in context: A213329 A069830 A153935 * A046652 A319860 A300354
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2009
STATUS
approved