A154060 - OEIS

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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.

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

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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: A156205 A065906 A370912 * A168305 A208155 A228219

Adjacent sequences: A154057 A154058 A154059 * A154061 A154062 A154063

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved