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A156422
Number of 16 X 16 arrays of squares of integers, symmetric under 90-degree rotation, with all rows summing to n.
0
1, 1680, 1756860, 449345680, 33899743010, 896812758240, 10075020851140, 65214945341280, 366766557522330, 2033591738777760, 9808527088125024, 42048089482202384
OFFSET
0,2
CROSSREFS
Sequence in context: A060095 A343459 A282402 * A172562 A172568 A172673
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved