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A166207 Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 12 1
1, 13, 5, 19, 479, 2636, 42285, 3484228, 56578703, 4011008946, 1447700846889, 76408068978456 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Sequence in context: A302208 A068662 A235366 * A121230 A299959 A278445

Adjacent sequences:  A166204 A166205 A166206 * A166208 A166209 A166210

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2009

STATUS

approved

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Last modified June 25 10:04 EDT 2022. Contains 354844 sequences. (Running on oeis4.)