A156501 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 37.

2, 0, 50, 18, 13276, 76680, 40760544, 1759663680, 1948154942040

Offset

2,1

Links

Table of n, a(n) for n=2..10.

Crossrefs

Sequence in context: A009493 A009718 A198799 * A012420 A140800 A012694

Adjacent sequences: A156498 A156499 A156500 * A156502 A156503 A156504

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved