A146515 Number of n X n arrays of squares of integers summing to 21 with every element equal to at least one neighbor.

0, 92, 17216, 5077564, 1460980380, 540147070759, 87704130371420

Offset

2,2

Links

Table of n, a(n) for n=2..8.

Crossrefs

Sequence in context: A267734 A146503 A252593 * A252631 A191948 A278860

Adjacent sequences: A146512 A146513 A146514 * A146516 A146517 A146518

Keyword

nonn

Author

R. H. Hardin Apr 14 2009

Status

approved