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A156421 Number of 16 X 16 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n. 0
1, 32400, 86549820, 39027027088, 4596517872930, 182963339479264, 3086652618464548, 31157969676392800, 303255697073306250, 2788382742936560544 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

CROSSREFS

Sequence in context: A234224 A190471 A236994 * A156423 A236656 A031639

Adjacent sequences:  A156418 A156419 A156420 * A156422 A156423 A156424

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2009

STATUS

approved

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Last modified July 4 05:35 EDT 2022. Contains 355064 sequences. (Running on oeis4.)