A156481 Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 24.

2, 0, 31, 210, 36876, 568284, 46154300, 2932212900, 1044426597950

Offset

4,1

Links

Table of n, a(n) for n=4..12.

Crossrefs

Sequence in context: A104466 A086487 A071147 * A176726 A156452 A156473

Adjacent sequences: A156478 A156479 A156480 * A156482 A156483 A156484

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved