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A156497
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 36.
0
1, 2, 8, 127, 7011, 1441324, 1060428518, 4031182499262, 44780594451612813
OFFSET
1,2
CROSSREFS
Sequence in context: A009360 A202648 A193481 * A064205 A081856 A038533
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved