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A156524
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 73.
0
2, 2, 102, 194, 52440, 367472, 1145093308, 43695620566
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..9.
CROSSREFS
Sequence in context:
A055470
A270591
A210467
*
A194027
A003110
A100956
Adjacent sequences:
A156521
A156522
A156523
*
A156525
A156526
A156527
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)