A146508 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 18 and every element equal to at least one neighbor.

4, 116, 59082, 38462980, 22016885138

Offset

3,1

Links

Table of n, a(n) for n=3..7.

Crossrefs

Sequence in context: A272158 A194535 A030255 * A374676 A365450 A096464

Adjacent sequences: A146505 A146506 A146507 * A146509 A146510 A146511

Keyword

nonn

Author

R. H. Hardin Apr 14 2009

Status

approved