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%I #7 Jan 27 2022 22:20:06
%S 1,2,4,371,146327,10311562327
%N Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order.
%C Diagonal of A216031.
%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....0..x..2..x....2..x..3..x....2..x..3..x....2..x..3..x
%e ..x..3..x..4....x..1..x..0....x..3..x..0....x..4..x..2....x..1..x..4
%e ..3..x..0..x....3..x..0..x....4..x..2..x....5..x..2..x....1..x..0..x
%Y Cf. A216031.
%K nonn
%O 1,2
%A _R. H. Hardin_, Aug 30 2012