A154077 Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 4 X 4 X 4 subtriangle summing to 10.

20, 87, 176, 369, 327, 477, 649, 644, 519, 410, 420, 461

Offset

4,1

Links

Table of n, a(n) for n=4..15.

Crossrefs

Sequence in context: A205312 A268888 A211158 * A027849 A243645 A219824

Adjacent sequences: A154074 A154075 A154076 * A154078 A154079 A154080

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved