A156524 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 73.

2, 2, 102, 194, 52440, 367472, 1145093308, 43695620566

Offset

2,1

Links

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

Crossrefs

Sequence in context: A055470 A270591 A210467 * A194027 A376440 A003110

Adjacent sequences: A156521 A156522 A156523 * A156525 A156526 A156527

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved