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A156468
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 18.
0
1, 8, 114, 3704, 285470, 46859304, 17604991124, 15033533213232, 35207864619957092
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OFFSET
2,2
LINKS
Table of n, a(n) for n=2..10.
CROSSREFS
Sequence in context: A220635 A113670 A347019 * A293992 A220575 A240890
Adjacent sequences: A156465 A156466 A156467 * A156469 A156470 A156471
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified November 8 01:15 EST 2024. Contains 377537 sequences.
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