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A153555
Number of planar n X n X n binary triangular grids with no more than 1 one in any 4 X 4 X 4 subtriangle.
0
1, 2, 4, 7, 11, 29, 94, 305, 942, 3700, 17914, 96925, 550823, 3593444, 27564919, 242155962, 2360399737, 25960549046, 327176065746, 4712254866397, 76708072697647, 1412166412163055, 29553071463431116, 703960430349591146
OFFSET
0,2
CROSSREFS
Sequence in context: A304040 A261145 A277339 * A259588 A058103 A346268
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2009
STATUS
approved