A166211 Number of nXnXn triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 16

1, 17, 6, 30, 1207, 8387, 211677, 34490146, 884190706, 123191992504

Offset

0,2

Links

Table of n, a(n) for n=0..9.

Crossrefs

Sequence in context: A243933 A145965 A040276 * A086763 A064545 A114032

Adjacent sequences: A166208 A166209 A166210 * A166212 A166213 A166214

Keyword

nonn

Author

R. H. Hardin Oct 09 2009

Status

approved