A156409 Number of 12 X 12 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.

1, 140152, 1521077404, 1322299270600, 148617033979348, 3031205165103456, 19223028387830564, 241889456638665264, 4311704697906480578

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Crossrefs

Sequence in context: A252902 A360843 A242143 * A281583 A186613 A036527

Adjacent sequences: A156406 A156407 A156408 * A156410 A156411 A156412

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved