A156477 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 22.

4, 84, 2772, 508190, 123856526, 64461381670, 82168021684448, 394312187045210712

Offset

3,1

Links

Table of n, a(n) for n=3..10.

Crossrefs

Sequence in context: A322330 A356504 A270577 * A024259 A357672 A361542

Adjacent sequences: A156474 A156475 A156476 * A156478 A156479 A156480

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved