%I #4 Dec 18 2015 18:17:22

%S 1,1,3,8,29,201,2045,42099,1463799,96669398,11401254845,2496036627878,

%T 998423279638638,740614345658818495,1016897944485885507894

%N Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and an odd number of ones in each row

%K nonn

%O 1,3

%A _R. H. Hardin_ Jun 25 2009