A156400 Number of 9 X 9 arrays of squares of integers, symmetric about the diagonal and under 90-degree rotation, with all rows summing to n.

1, 0, 0, 0, 18, 0, 0, 0, 0, 11, 0, 0, 64, 0, 0, 0, 42, 18, 0, 0, 42, 0, 0, 0, 72, 36, 0, 0, 0, 0, 0, 0, 96, 15, 0, 0, 257, 0, 0, 0, 120, 72, 0, 0, 240, 0, 0, 0, 172, 288, 0, 0, 204, 0, 0, 0, 216, 122, 0, 0, 0, 0, 0, 0, 138, 36, 0, 0, 1050, 0, 0, 0, 192, 294, 0, 0, 1320, 0, 0, 0, 186, 387, 0, 0

Offset

0,5

Links

Table of n, a(n) for n=0..83.

Crossrefs

Sequence in context: A187567 A160145 A072839 * A008424 A023920 A214359

Adjacent sequences: A156397 A156398 A156399 * A156401 A156402 A156403

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved