Search: id:A162059
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%I A162059
%S A162059 2,6,18,100,691,6729,78478,1102775,17908058,330070220,6865933571,
%T A162059 158038101259,4006358927524,110885649721312
%N A162059 Number of nXn symmetric binary arrays with rows, considered as graycode 
               numbers, in nondecreasing order, and no more than 4 ones in any row 
               or column
%Y A162059 Sequence in context: A000138 A028857 A052687 this_sequence A162060 A162061 
               A162062
%Y A162059 Adjacent sequences: A162056 A162057 A162058 this_sequence A162060 A162061 
               A162062
%K A162059 nonn
%O A162059 1,1
%A A162059 Ron Hardin (rhhardin(AT)att.net) Jun 25 2009

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