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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
OFFSET
0,2
CROSSREFS
Sequence in context: A084517 A070568 A161884 * A141078 A298830 A302215
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 09 2009
STATUS
approved