A154090 Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 14.

0, 877, 6567, 0, 8577, 46236, 0, 21094, 113156, 0

Offset

5,2

Links

Table of n, a(n) for n=5..14.

Example

Maximal zeros solution for n=12
.............0
............0.2
...........6.4.0
..........0.0.0.0
.........0.0.0.0.2
........0.0.0.0.4.2
.......2.0.0.2.4.0.0
......2.4.4.0.0.0.0.0
.....0.0.0.2.0.2.0.0.0
....0.0.0.0.0.4.0.0.0.6
...2.4.0.0.0.0.4.0.0.4.0
..0.0.6.0.0.0.2.2.0.0.2.0

Crossrefs

Sequence in context: A346860 A320558 A270771 * A294057 A255947 A048791

Adjacent sequences: A154087 A154088 A154089 * A154091 A154092 A154093

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved