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Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor
0

%I #4 Nov 23 2013 13:35:00

%S 15,2689,2189991,16776955943,1137726954093673,615510832230066725429,

%T 2693465102291782418303130499

%N Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor

%C Diagonal of A232414

%e Some solutions for n=2

%e ..0..2..2....0..2..1....2..2..1....2..0..0....1..2..1....2..0..0....2..2..0

%e ..2..0..2....2..0..0....2..0..1....1..2..2....2..0..1....2..2..1....2..0..0

%e ..2..2..1....0..1..0....0..2..2....1..1..1....2..2..0....2..2..2....0..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 23 2013