A156407 Number of 11 X 11 arrays of squares of integers, symmetric about the diagonal and under 90-degree rotation, with all rows summing to n.

1, 0, 0, 0, 112, 0, 0, 0, 80, 0, 0, 291, 1380, 0, 0, 0, 468, 0, 0, 868, 1680, 0, 0, 0, 3500, 0, 0, 4560, 1180, 0, 0, 0, 5030, 0, 0, 5603, 13884, 0, 0, 0, 16464, 0, 0, 10520, 28039, 0, 0, 0, 18060, 0, 0, 30480, 37500, 0, 0, 0, 37704, 0, 0, 38588, 16080, 0, 0, 0, 30068, 0, 0, 91760

Offset

0,5

Links

Table of n, a(n) for n=0..67.

Crossrefs

Sequence in context: A176194 A261820 A262661 * A292155 A341011 A103849

Adjacent sequences: A156404 A156405 A156406 * A156408 A156409 A156410

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved