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Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically
1

%I #4 Jan 30 2015 14:46:21

%S 512,26380,2085712,275772848,71814202464,37859718002056,

%T 41728495959588032,96370792918403418032,471658574277826549969856,

%U 4899488261874299641047185592,107824890536438862557050692197760

%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically

%C Diagonal of A254457

%e Some solutions for n=2

%e ..0..1..0..0....0..0..0..0....1..0..1..0....1..1..1..1....0..0..1..1

%e ..1..1..1..0....0..1..1..1....0..1..0..1....0..0..1..1....0..1..1..1

%e ..0..0..0..0....1..1..0..1....0..0..0..0....1..1..1..0....1..1..1..1

%e ..0..1..1..1....1..0..1..1....0..1..0..0....1..0..1..1....0..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 30 2015