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A156516
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 53.
0
2, 12, 180, 6058, 2130020, 3614728470, 37525899871744, 1411771686417771108
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..9.
CROSSREFS
Sequence in context:
A125861
A334175
A228508
*
A228593
A067962
A134716
Adjacent sequences:
A156513
A156514
A156515
*
A156517
A156518
A156519
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified March 28 07:18 EDT 2024. Contains 371235 sequences. (Running on oeis4.)