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A229636 Number of defective 3-colorings of an n X 7 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

%I A229636 #8 Apr 27 2021 22:20:27
%S A229636 120,5392,136778,3723370,98015235,2495874984,61836040854,
%T A229636 1498317588826,35650331594818,835527599342816,19334282699326025,
%U A229636 442561024351155220,10035487974561746994,225705889177614527760,5039777091823275662663
%N A229636 Number of defective 3-colorings of an n X 7 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
%C A229636 Column 7 of A229637.
%H A229636 R. H. Hardin, <a href="/A229636/b229636.txt">Table of n, a(n) for n = 1..210</a>
%H A229636 R. H. Hardin, <a href="/A229636/a229636.txt">Empirical recurrence of order 57</a>
%F A229636 Empirical recurrence of order 57 (see link above).
%e A229636 Some solutions for n=3:
%e A229636   0 1 2 0 2 1 0      0 1 2 1 0 1 2      0 1 0 1 2 1 2
%e A229636   2 1 0 1 0 1 0      0 1 0 1 2 1 0      2 1 0 1 2 1 0
%e A229636   2 1 2 1 0 1 0      0 2 0 1 2 1 1      1 0 2 1 2 1 0
%K A229636 nonn
%O A229636 1,1
%A A229636 _R. H. Hardin_, Sep 27 2013