A166221 Number of 13X13X13 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n

1, 1195, 433447, 81325310, 6511049130, 283350411160, 8966527587527, 191827791698093

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