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A216610 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX5 array with new integer colors introduced in row major order.

%I A216610 #6 Jul 22 2025 23:33:09
%S A216610 1,5,41,3429,83437,20880505,942420901,484968748793,33862631596393,
%T A216610 30012936243058237,2941251571063448753,4040674235335081456861,
%U A216610 522798156103780731219765,1037627124289198371293601937
%N A216610 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX5 array with new integer colors introduced in row major order.
%C A216610 Column 5 of A216612
%H A216610 R. H. Hardin, <a href="/A216610/b216610.txt">Table of n, a(n) for n = 1..25</a>
%e A216610 Some solutions for n=4
%e A216610 ..x..0..x..1..x....x..0..x..1..x....x..0..x..1..x....x..0..x..1..x
%e A216610 ..2..x..3..x..4....2..x..3..x..0....2..x..3..x..4....1..x..2..x..3
%e A216610 ..x..5..x..0..x....x..4..x..1..x....x..5..x..6..x....x..4..x..1..x
%e A216610 ..2..x..1..x..5....3..x..0..x..2....4..x..1..x..5....5..x..6..x..2
%K A216610 nonn
%O A216610 1,2
%A A216610 _R. H. Hardin_ Sep 10 2012