A156401 Number of 9 X 9 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.

1, 12, 0, 0, 2334, 2400, 0, 0, 10236, 6871, 0, 0, 19368, 51672, 0, 0, 78762, 62322, 0, 0, 352350, 244572, 0, 0, 568284, 268092, 0, 0, 590400, 1134048, 0, 0, 960648, 688347, 0, 0, 3730237, 3085200, 0, 0, 5025540, 1936344, 0, 0, 3311664, 7083564, 0, 0, 5061300

Offset

0,2

Links

Table of n, a(n) for n=0..48.

Crossrefs

Sequence in context: A230926 A064141 A230526 * A246223 A199542 A304330

Adjacent sequences: A156398 A156399 A156400 * A156402 A156403 A156404

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved