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Search: id:A162119
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A162119 Number of nXn binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 2 ones in any row or column +0
1
2, 4, 16, 67, 327, 1827, 11291, 76436, 560922, 4424644, 37272300, 333474298, 3154416275, 31423894296, 328562851763 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A061286 A019279 A061652 this_sequence A155519 A058926 A102736

Adjacent sequences: A162116 A162117 A162118 this_sequence A162120 A162121 A162122

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jun 25 2009

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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