%I #6 Jan 01 2024 18:34:51
%S 2,3,9,48,397,4046,50562,725875,11870670,219522591,4530707851,
%T 103448006539,2595528068368,71042542549939
%N Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 4 ones in any row.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jun 25 2009