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A156507
Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 43.
0
2, 58, 204, 41816, 422538, 169361504, 5201763072, 5719198097600
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OFFSET
3,1
LINKS
Table of n, a(n) for n=3..10.
CROSSREFS
Sequence in context:
A104494
A121931
A343578
*
A285148
A115610
A341082
Adjacent sequences:
A156504
A156505
A156506
*
A156508
A156509
A156510
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)