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A156522
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 65.
0
4, 18, 372, 16404, 5141900, 9054510666, 197569263663408, 15383832371115704364
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OFFSET
2,1
LINKS
Table of n, a(n) for n=2..9.
CROSSREFS
Sequence in context:
A214168
A214189
A214240
*
A086400
A082022
A354303
Adjacent sequences:
A156519
A156520
A156521
*
A156523
A156524
A156525
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 09 2009
STATUS
approved
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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)