A154094 Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 15.

22308, 168794, 505725, 1434840, 2268199, 4350854, 6106648, 6385418, 5120411

Offset

5,1

Links

Table of n, a(n) for n=5..13.

Crossrefs

Sequence in context: A252774 A253042 A216202 * A206656 A329787 A224648

Adjacent sequences: A154091 A154092 A154093 * A154095 A154096 A154097

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved