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A216335 Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X 5 array with new integer colors introduced in row major order.

%I A216335 #6 Jun 16 2023 15:29:07
%S A216335 2,12,602,12840,2387180,99827160,41521045376,2751754706832,
%T A216335 2063225889204272,194478305002268064,232628053298868289568,
%U A216335 29191372156840204219200,51464654047934299798487552
%N A216335 Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X 5 array with new integer colors introduced in row major order.
%C A216335 Column 5 of A216338.
%H A216335 R. H. Hardin, <a href="/A216335/b216335.txt">Table of n, a(n) for n = 1..49</a>
%e A216335 Some solutions for n=4
%e A216335 ..0..x..1..x..2....0..x..1..x..2....0..x..1..x..2....0..x..1..x..0
%e A216335 ..x..3..x..4..x....x..3..x..1..x....x..3..x..0..x....x..2..x..3..x
%e A216335 ..1..x..5..x..3....2..x..0..x..3....1..x..4..x..5....4..x..1..x..0
%e A216335 ..x..4..x..0..x....x..2..x..0..x....x..6..x..7..x....x..0..x..4..x
%Y A216335 Cf. A216338.
%K A216335 nonn
%O A216335 1,1
%A A216335 _R. H. Hardin_, Sep 04 2012