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A156494
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 33.
0
4, 74, 184, 8852, 37944, 21579568, 316294683, 816922403024
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OFFSET
3,1
LINKS
Table of n, a(n) for n=3..10.
CROSSREFS
Sequence in context:
A090212
A137046
A104335
*
A232371
A114878
A368353
Adjacent sequences:
A156491
A156492
A156493
*
A156495
A156496
A156497
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified July 19 10:32 EDT 2024. Contains 374392 sequences. (Running on oeis4.)