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%I #4 Dec 01 2014 10:45:07
%S 11,114,1667,32636,790734,22806904,760734085,28749778264,
%T 1212060756101,56320777311152,2856799572599106,156942568859096170,
%U 9277021941286520402,586789114650518446860,39528041606657916420501
%N Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having x11-x00 less than x10-x01
%C Diagonal of A251268
%e Some solutions for n=4
%e ..0..0..0..0..0....0..0..0..1..1....1..0..0..0..1....0..0..1..1..1
%e ..0..0..0..0..1....1..1..1..1..1....0..1..1..1..1....0..0..0..0..1
%e ..0..0..1..1..1....0..0..0..0..1....0..0..1..1..1....0..0..0..1..1
%e ..0..1..0..0..1....0..0..0..1..1....0..0..0..0..0....1..1..1..1..1
%e ..0..0..1..1..1....0..0..1..0..0....0..1..1..1..1....0..0..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 01 2014
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