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A156423 Number of 17 X 17 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n. 0
1, 32400, 221921280, 131023800192, 38710991748930, 1839487795001024, 71091010320744928, 681286019507189376 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..7.

CROSSREFS

Sequence in context: A190471 A236994 A156421 * A236656 A031639 A233680

Adjacent sequences:  A156420 A156421 A156422 * A156424 A156425 A156426

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 09 2009

STATUS

approved

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Last modified July 1 04:13 EDT 2022. Contains 354951 sequences. (Running on oeis4.)