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A156475
Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 21.
0
6, 130, 1872, 121382, 17647254, 18669753424, 68782403549580, 503051985491086584
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OFFSET
3,1
LINKS
Table of n, a(n) for n=3..10.
CROSSREFS
Sequence in context: A338709 A318528 A095695 * A000907 A188718 A077031
Adjacent sequences: A156472 A156473 A156474 * A156476 A156477 A156478
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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