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A156398
Number of 9 X 9 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.
0
1, 2620, 708256, 24243520, 154294582, 253938600, 1164072896, 10953612400, 25250999564, 22620401127, 101930271184, 570443632816, 781505368112, 474109634808, 1937140499056, 9267607094192, 12532444401442, 7484174351906
OFFSET
0,2
CROSSREFS
Sequence in context: A245008 A180330 A238921 * A139675 A292175 A295482
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved