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A156418
Number of 15 X 15 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.
0
1, 6512, 9783480, 1609793976, 142719383676, 2380048630848, 35263399597916, 162770370597240, 1794934830265052, 6285859127170900, 53808016711020432
OFFSET
0,2
CROSSREFS
Sequence in context: A338951 A251447 A156416 * A258521 A068270 A216666
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2009
STATUS
approved