A156491 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 32.

1, 4, 18, 818, 310150, 480685728, 1904647839311, 14116339350926312

Offset

2,2

Links

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

Crossrefs

Sequence in context: A173222 A342467 A367533 * A287677 A069874 A222323

Adjacent sequences: A156488 A156489 A156490 * A156492 A156493 A156494

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved