A156512 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 50.

3, 22, 474, 21676, 6117690, 8086830378, 27448134968478, 351300513333271976

Offset

2,1

Links

Table of n, a(n) for n=2..9.

Crossrefs

Sequence in context: A385547 A394784 A364844 * A385549 A119770 A395410

Adjacent sequences: A156509 A156510 A156511 * A156513 A156514 A156515

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved