A146497 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 13 and every element equal to at least one neighbor.

0, 20, 17226, 8194791, 1995724092, 51267367432

Offset

3,2

Links

Table of n, a(n) for n=3..8.

Crossrefs

Sequence in context: A167060 A172661 A172758 * A348144 A060618 A369948

Adjacent sequences: A146494 A146495 A146496 * A146498 A146499 A146500

Keyword

nonn

Author

R. H. Hardin Apr 14 2009

Status

approved