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A154060 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 6. 0
15, 48, 136, 132, 79, 180, 173, 60, 137, 52, 50, 22, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48 (list; graph; refs; listen; history; text; internal format)
OFFSET

5,1

COMMENTS

Pattern 48 48 48 48 20 starts at n=17 and continues through at least n=53.

LINKS

Table of n, a(n) for n=5..53.

CROSSREFS

Sequence in context: A000813 A156205 A065906 * A168305 A208155 A228219

Adjacent sequences:  A154057 A154058 A154059 * A154061 A154062 A154063

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified January 22 11:21 EST 2021. Contains 340362 sequences. (Running on oeis4.)