Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #9 Apr 27 2021 21:29:04
%S 120,15795,792929,31848813,1153135492,39229935270,1279020266434,
%T 40413033646242,1246326317951687,37697561397216125,
%U 1122224822297521683,32965710304040001780,957481537679788357971,27540249663372893582723
%N Number of defective 3-colorings of an n X 7 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.
%C Column 7 of A229606.
%H R. H. Hardin, <a href="/A229605/b229605.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A229605/a229605.txt">Empirical recurrence of order 46</a>
%F Empirical recurrence of order 46 (see link above).
%e Some solutions for n=3:
%e 0 1 2 0 1 2 1 0 1 2 0 1 0 0 0 1 2 1 0 2 0
%e 0 2 1 2 0 1 2 0 2 0 1 2 1 2 0 2 1 0 1 0 1
%e 2 0 2 1 0 2 1 2 1 2 0 1 2 1 1 0 2 1 0 2 2
%Y Cf. A229606.
%K nonn
%O 1,1
%A _R. H. Hardin_, Sep 26 2013