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A166220 Number of 12 X 12 X 12 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n. 1
1, 325, 52518, 4173156, 165533393, 4118194905, 73044448611, 958018305487, 9916013916442, 84913600697770 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

CROSSREFS

Sequence in context: A145414 A298106 A266365 * A121000 A290949 A048909

Adjacent sequences:  A166217 A166218 A166219 * A166221 A166222 A166223

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Oct 09 2009

STATUS

approved

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Last modified April 8 04:26 EDT 2020. Contains 333312 sequences. (Running on oeis4.)