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%I #4 Nov 25 2014 10:59:53
%S 512,39852,9583440,6967413024,15037777879872,99734163008521518,
%T 2034240174378849957658,127927996167974091553962336
%N Number of (n+2)X(n+2) 0..1 arrays with nondecreasing maximum of every three consecutive values in every row and column
%C Diagonal of A250574
%e Some solutions for n=2
%e ..0..1..1..0....0..0..0..1....0..0..1..1....1..0..0..1....0..1..0..1
%e ..0..1..1..0....1..1..0..0....0..0..0..0....0..0..0..0....0..1..1..1
%e ..0..0..0..1....0..1..1..0....1..1..1..1....1..0..0..1....1..0..0..1
%e ..1..1..0..0....0..1..0..1....0..0..1..1....1..1..0..0....1..0..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 25 2014