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A156518
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 61.
0
2, 12, 326, 16298, 5919644, 9055603332, 108964188487952, 6758216414353306068
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..9.
CROSSREFS
Sequence in context:
A094047
A300045
A091472
*
A012727
A296622
A325756
Adjacent sequences:
A156515
A156516
A156517
*
A156519
A156520
A156521
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)