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%I #6 Dec 01 2014 12:59:07
%S 10,40,108,266,580,1214,2420,4702,8926,16680,30766,56180,101734,
%T 182956,327080,581742,1030000,1816290,3191136,5588050,9755530,
%U 16983260,29489098
%N Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements
%C Diagonal of A251128
%e Some solutions for n=4
%e ..0..0..0..0..1....0..0..0..1..1....0..0..0..1..1....1..0..1..0..1
%e ..0..0..0..0..1....0..0..0..0..0....1..0..0..0..0....1..0..1..0..1
%e ..0..0..0..0..1....1..1..1..1..1....1..0..0..0..0....1..0..1..0..0
%e ..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....1..0..1..0..0
%e ..1..0..0..0..0....1..1..0..0..0....1..0..0..0..0....1..0..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 30 2014
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