A162038 - OEIS

A162038

Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row

%I #4 Dec 18 2015 18:17:21

%S 2,5,17,86,612,5468,62853,856193,13518083,243899329,4944615404,

%T 111381110541,2765327931184,75061918010044

%N Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009