A156515 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 52.

2, 6, 134, 10554, 5819580, 9898523036, 72477416788308, 2085565005226231500

Offset

2,1

Links

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

Crossrefs

Sequence in context: A288185 A359961 A274695 * A254223 A206849 A368395

Adjacent sequences: A156512 A156513 A156514 * A156516 A156517 A156518

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved