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

%I #4 Jan 13 2015 21:21:33

%S 512,22284,1876256,300044272,83428823136,46476504760232,

%T 52039375590860424,118597465899997893216,569271553154356424613768,

%U 5751777935867721798745615520

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

%C Diagonal of A253801

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 13 2015