A154057 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 6.

10, 25, 36, 74, 46, 40, 70, 47, 49, 20, 13, 19, 17, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13

Offset

4,1

Comments

Value 13 starts at n=17 and continues through at least n=60.

Links

Table of n, a(n) for n=4..60.

Crossrefs

Sequence in context: A274046 A014090 A345651 * A074814 A002600 A087473

Adjacent sequences: A154054 A154055 A154056 * A154058 A154059 A154060

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved