A154066 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 8.

10, 49, 83, 111, 126, 92, 91, 126, 90, 72, 74, 29, 14, 22, 22, 12, 10

Offset

4,1

Links

Table of n, a(n) for n=4..20.

Example

Maximal zeros solution for n=4
.....0
....0.0
...0.8.0
..0.0.0.0

Crossrefs

Sequence in context: A048698 A045770 A217165 * A056578 A370216 A307904

Adjacent sequences: A154063 A154064 A154065 * A154067 A154068 A154069

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved