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A156447
Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 8.
0
1, 0, 2, 2, 24, 60, 1483, 10236, 175765, 2771020, 133072650, 2511725250, 142353126510, 4354347220860, 366766557522330, 16657062087640520
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OFFSET
2,3
LINKS
Table of n, a(n) for n=2..17.
CROSSREFS
Sequence in context: A226979 A261517 A131448 * A272641 A334123 A127261
Adjacent sequences: A156444 A156445 A156446 * A156448 A156449 A156450
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 09 2009
STATUS
approved

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Last modified November 7 22:02 EST 2024. Contains 377536 sequences.
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