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Search: id:A156455
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A156455 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 12. +0
1
1, 20, 352, 17550, 2246390, 991288522, 781505368112, 976681206480324, 1865446774685049420 (list; graph; listen)
OFFSET

3,2

CROSSREFS

Sequence in context: A167031 A005748 A093144 this_sequence A089350 A004292 A053508

Adjacent sequences: A156452 A156453 A156454 this_sequence A156456 A156457 A156458

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 09 2009

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


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