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A162116 Number of nXn symmetric binary arrays with rows, considered as graycode numbers, in strictly increasing order, and no more than 8 ones in any row or column 0
2, 4, 9, 56, 499, 8000, 207554, 9382078, 723818669, 93919689474, 19191447316594, 5833792312541241 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Sequence in context: A162113 A162114 A162115 * A162117 A162109 A067603

Adjacent sequences:  A162113 A162114 A162115 * A162117 A162118 A162119

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Jun 25 2009

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.