cp's OEIS Frontend

A229643 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

%I A229643 #8 Apr 28 2021 01:22:49
%S A229643 0,15795,277996,6049298,133784624,2902520386,61836040854,
%T A229643 1290897457785,26533491049453,537479161392127,10758714918897447,
%U A229643 213067493458619915,4181337838281995586,81391742898664549466,1573067212373296604298
%N A229643 Number of defective 3-colorings of a 7 X n 0..2 array connected horizontally, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
%C A229643 Row 7 of A229637.
%H A229643 R. H. Hardin, <a href="/A229643/b229643.txt">Table of n, a(n) for n = 1..210</a>
%e A229643 Some solutions for n=3:
%e A229643   0 1 0   0 1 0   0 1 0   0 1 0   0 1 0   0 1 0   0 1 0
%e A229643   2 1 0   0 1 2   0 1 2   0 1 2   2 1 0   0 1 0   0 1 2
%e A229643   2 2 0   0 2 1   0 0 2   2 1 0   0 2 2   0 1 0   0 1 0
%e A229643   0 1 0   1 2 0   2 1 2   1 2 0   0 1 0   2 1 2   0 2 0
%e A229643   0 2 0   1 2 0   2 1 0   1 2 0   0 2 0   0 2 0   0 1 1
%e A229643   0 1 0   0 2 0   0 1 0   1 2 1   0 2 1   1 2 1   0 1 2
%e A229643   0 1 2   0 2 0   2 1 0   1 2 0   1 2 1   0 2 0   2 1 0
%K A229643 nonn
%O A229643 1,2
%A A229643 _R. H. Hardin_, Sep 27 2013