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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

Sequence in context: A284102 A251447 A156416 * A258521 A068270 A216666

Adjacent sequences:  A156415 A156416 A156417 * A156419 A156420 A156421

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2009

STATUS

approved

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Last modified January 17 20:36 EST 2020. Contains 330987 sequences. (Running on oeis4.)