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A166210 Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 15 1
1, 16, 6, 27, 977, 6434, 146337, 20390870, 470828929, 56179164262 (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: A084517 A070568 A161884 * A141078 A298830 A302215

Adjacent sequences:  A166207 A166208 A166209 * A166211 A166212 A166213

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2009

STATUS

approved

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Last modified November 28 00:12 EST 2021. Contains 349395 sequences. (Running on oeis4.)