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%I #4 Nov 27 2014 15:12:23
%S 9,46,230,1152,5688,27986,137082,670608,3275574,15987988,77980390,
%T 380145754,1852275976,9021572492,43923360572,213777365336
%N Number of (n+1)X(n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction
%C Diagonal of A250783
%e Some solutions for n=4
%e ..1..0..0..0..0....1..0..0..0..1....1..0..1..0..1....0..1..0..0..1
%e ..1..0..0..0..0....1..0..0..0..1....1..0..1..0..1....0..1..0..0..1
%e ..1..0..0..0..1....1..0..0..0..1....1..0..1..0..1....0..1..0..0..1
%e ..0..1..1..1..0....1..1..1..1..0....0..1..0..1..0....0..1..0..1..0
%e ..0..1..1..1..0....1..1..1..1..1....0..1..0..1..1....0..1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 27 2014
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