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A162119
Number of n X n 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
2, 4, 16, 67, 327, 1827, 11291, 76436, 560922, 4424644, 37272300, 333474298, 3154416275, 31423894296, 328562851763
OFFSET
1,1
CROSSREFS
Sequence in context: A278913 A306979 A358032 * A213327 A192623 A155519
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 25 2009
STATUS
approved