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A156424 Number of 17X17 arrays of squares of integers, symmetric about the diagonal and under 90 degree rotation, with all rows summing to n. +0
1
1, 0, 0, 0, 66178, 0, 0, 0, 7777280, 0, 0, 0, 73938288, 0, 0, 0, 1262896895, 89959563, 0, 0, 5559809528, 0, 0, 0, 30866580416, 991288522, 0, 0 (list; graph; listen)
OFFSET

0,5
CROSSREFS

Sequence in context: A063825 A043678 A032781 this_sequence A092376 A157620 A164129

Adjacent sequences: A156421 A156422 A156423 this_sequence A156425 A156426 A156427

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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