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%I #8 Apr 27 2021 20:55:36
%S 246,31232,1077588,31875248,900320160,24789931648,670127758336,
%T 17852292042240,469937543774464,12248485869502464,316606271260610304,
%U 8126559364143173120,207342059767316802816,5262820354775597920256
%N Number of defective 4-colorings of an n X 7 0..3 array connected horizontally, antidiagonally and vertically with exactly one mistake, and colors introduced in row-major 0..3 order.
%C Column 7 of A229479.
%H R. H. Hardin, <a href="/A229478/b229478.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3:
%e 0 1 0 2 1 3 2 0 1 0 2 1 2 3 0 1 0 2 0 3 0
%e 1 3 1 0 2 1 0 1 3 1 3 0 1 2 1 3 1 3 2 1 3
%e 2 0 3 1 3 2 1 0 2 0 1 2 0 1 2 0 2 1 3 0 1
%Y Cf. A229479.
%K nonn
%O 1,1
%A _R. H. Hardin_, Sep 24 2013
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