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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
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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 March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)