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%I #5 Dec 01 2014 13:38:36
%S 10,79,890,16006,451826,20080487,1401489913,153420339471,
%T 26520184876394,7212082506701341,3095565630909130451,
%U 2090970229906057682594,2228353475131985328672710,3744199174821109524081657694
%N Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements
%C Diagonal of A251317
%H R. H. Hardin, <a href="/A251309/b251309.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for n=4
%e ..1..1..0..0..1....1..1..0..0..0....1..1..0..0..0....1..0..0..0..1
%e ..0..1..0..0..0....0..1..1..1..0....0..1..1..0..0....1..1..1..0..1
%e ..0..1..0..0..0....0..0..0..1..0....1..0..1..1..0....0..0..1..1..0
%e ..0..1..1..1..1....0..0..0..1..1....1..0..0..1..0....0..0..0..1..1
%e ..1..0..0..0..1....1..0..0..0..0....1..0..0..1..0....1..1..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 01 2014
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