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A215922 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an nX5 array with new integer colors introduced in row major order.

%I A215922 #6 Jul 22 2025 23:27:41
%S A215922 2,15,136,12840,322768,87852626,4044766240,2227156082842,
%T A215922 157752739276184,148049849095504726,14670983946354664200,
%U A215922 21183598567292002167082,2765649842153732133940784,5737167377815628378510929822
%N A215922 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an nX5 array with new integer colors introduced in row major order.
%C A215922 Column 5 of A215924
%H A215922 R. H. Hardin, <a href="/A215922/b215922.txt">Table of n, a(n) for n = 1..25</a>
%e A215922 Some solutions for n=3
%e A215922 ..x..0..x..1..x....x..0..x..1..x....x..0..x..0..x....x..0..x..0..x
%e A215922 ..2..x..3..x..0....2..x..3..x..0....1..x..1..x..2....1..x..2..x..3
%e A215922 ..x..0..x..1..x....x..4..x..1..x....x..0..x..3..x....x..4..x..1..x
%K A215922 nonn
%O A215922 1,1
%A A215922 _R. H. Hardin_ Aug 27 2012