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.

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

Links

Table of n, a(n) for n=0..23.

Crossrefs

Sequence in context: A304040 A261145 A277339 * A259588 A058103 A346268

Adjacent sequences: A153552 A153553 A153554 * A153556 A153557 A153558

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved