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%I #6 Dec 18 2015 18:17:32
%S 1,5,22,380,11499,1497764,408834576,475512062908
%N Number of n X n binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 and rows and columns in nondecreasing order
%C Diagonal of A183413
%e Some solutions for 4X4
%e ..0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..0....0..0..0..0
%e ..0..1..0..0....0..0..0..1....0..0..1..0....0..0..0..0....0..0..1..1
%e ..0..1..0..0....0..0..0..1....0..1..1..0....0..1..1..1....0..0..1..1
%e ..1..1..0..0....0..0..1..1....1..0..1..0....1..0..0..0....0..1..1..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Jan 04 2011
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