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Search: id:A156468
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A156468 Number of nXn arrays of squares of integers, symmetric about main diagonal, with all rows summing to 18. +0
1
1, 8, 114, 3704, 285470, 46859304, 17604991124, 15033533213232, 35207864619957092 (list; graph; listen)
OFFSET

2,2

CROSSREFS

Sequence in context: A023814 A062126 A113670 this_sequence A056988 A085699 A046914

Adjacent sequences: A156465 A156466 A156467 this_sequence A156469 A156470 A156471

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.


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