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%I #5 Nov 28 2014 18:59:13
%S 155,699,2812,10528,37477,128507,428095,1394237,4460779,14073313,
%T 43911559,135823357,417243011,1274860729,3878857343,11762928117,
%U 35580876923,107413523505,323772483447,974796593517,2932252102515
%N Number of (n+1)X(2+1) 0..2 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 Column 2 of A250942
%H R. H. Hardin, <a href="/A250936/b250936.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 13*a(n-1) -71*a(n-2) +211*a(n-3) -368*a(n-4) +376*a(n-5) -208*a(n-6) +48*a(n-7) for n>11
%e Some solutions for n=4
%e ..0..2..0....2..0..2....0..0..2....2..0..1....0..0..0....1..0..1....0..1..0
%e ..1..1..1....2..0..2....1..1..1....2..0..2....0..0..0....1..0..1....1..0..2
%e ..0..2..0....2..0..2....2..2..0....1..1..1....0..0..1....2..1..0....0..2..0
%e ..1..1..2....2..0..2....2..2..1....0..2..0....1..1..2....2..1..1....1..1..1
%e ..1..2..1....2..0..2....2..2..2....1..1..2....1..1..2....2..1..1....0..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 28 2014
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