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A166221 Number of 13X13X13 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n 1
1, 1195, 433447, 81325310, 6511049130, 283350411160, 8966527587527, 191827791698093 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Sequence in context: A251923 A251916 A251915 * A096955 A113898 A059401

Adjacent sequences:  A166218 A166219 A166220 * A166222 A166223 A166224

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2009

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)