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Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order
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%I #5 Dec 18 2015 18:18:13

%S 1,1,2,203,83437,6423127757,2043835395791757,324446722340564335642246

%N Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order

%C Diagonal of A216612

%e Some solutions for n=4

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

%e ..2..x..3..x....2..x..3..x....1..x..2..x....1..x..2..x....2..x..3..x

%e ..x..4..x..1....x..4..x..1....x..3..x..4....x..0..x..3....x..4..x..1

%e ..5..x..0..x....1..x..5..x....2..x..5..x....3..x..2..x....1..x..3..x

%K nonn

%O 1,3

%A _R. H. Hardin_ Sep 10 2012