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A156416
Number of 14 X 14 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
0
1, 6512, 4086600, 509911008, 18944759304, 266388662656, 1840450801838, 10754086795840, 75157230205402, 399699792848864, 1397876167796318, 4499416656998240, 18657442342135966, 66490911199244672, 164256548772296153
OFFSET
0,2
CROSSREFS
Sequence in context: A284102 A338951 A251447 * A156418 A258521 A068270
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved