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A156455
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 12.
0
1, 20, 352, 17550, 2246390, 991288522, 781505368112, 976681206480324, 1865446774685049420
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OFFSET
3,2
LINKS
Table of n, a(n) for n=3..11.
CROSSREFS
Sequence in context:
A230236
A093144
A285393
*
A358365
A089350
A323961
Adjacent sequences:
A156452
A156453
A156454
*
A156456
A156457
A156458
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)