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%I #5 Nov 26 2014 12:48:33
%S 9,34,109,316,859,2234,5625,13816,33271,78838,184309,425972,974835,
%T 2211826,4980721,11141104,24772591,54788078,120586221,264241132,
%U 576716779,1254096874,2717908969,5872025576,12650020839,27179089894
%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 min(x(i,j),x(i-1,j)) in the j direction
%C Diagonal of A250656
%H R. H. Hardin, <a href="/A250652/b250652.txt">Table of n, a(n) for n = 1..69</a>
%e Some solutions for n=4
%e ..0..0..0..0..0....1..1..0..0..0....1..1..1..1..0....1..0..0..0..0
%e ..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
%e ..0..0..0..0..0....0..1..1..1..1....0..0..0..0..0....1..1..1..1..1
%e ..0..0..0..0..0....0..1..1..1..1....0..0..0..0..0....0..0..1..1..1
%e ..0..0..1..1..1....0..1..1..1..1....0..1..1..1..1....0..0..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 26 2014