%I #5 Dec 18 2015 18:18:13
%S 1,1,7,203,580479,6423127757,22530453266592757
%N Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order
%C Diagonal of A216460
%e Some solutions for n=4
%e ..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
%e ..x..2..x..3....x..2..x..3....x..2..x..3....x..2..x..3....x..2..x..3
%e ..3..x..1..x....3..x..4..x....4..x..0..x....3..x..4..x....0..x..1..x
%e ..x..4..x..2....x..5..x..2....x..1..x..3....x..1..x..2....x..4..x..0
%K nonn
%O 1,3
%A _R. H. Hardin_ Sep 07 2012