A156522 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 65.

4, 18, 372, 16404, 5141900, 9054510666, 197569263663408, 15383832371115704364

Offset

2,1

Links

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

Crossrefs

Sequence in context: A214168 A214189 A214240 * A086400 A082022 A354303

Adjacent sequences: A156519 A156520 A156521 * A156523 A156524 A156525

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved