A166223 Number of 15X15X15 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n

1, 6460, 14252749, 10459516337, 2908246084285, 398461742491565

Offset

0,2

Links

Table of n, a(n) for n=0..5.

Crossrefs

Sequence in context: A248998 A256090 A067928 * A206538 A288083 A232134

Adjacent sequences: A166220 A166221 A166222 * A166224 A166225 A166226

Keyword

nonn

Author

R. H. Hardin Oct 09 2009

Status

approved