cp's OEIS Frontend

A229684 Number of defective 3-colorings of an n X 7 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.

%I A229684 #9 Apr 28 2021 01:22:28
%S A229684 0,101376,7952256,437924880,21063718224,937213830720,39647663129952,
%T A229684 1617006498774912,64143524707305984,2489243835565159488,
%U A229684 94897266574306915296,3564781098414437505600,132254323024723203273120
%N A229684 Number of defective 3-colorings of an n X 7 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
%C A229684 Column 7 of A229685.
%H A229684 R. H. Hardin, <a href="/A229684/b229684.txt">Table of n, a(n) for n = 1..172</a>
%H A229684 R. H. Hardin, <a href="/A229684/a229684.txt">Empirical recurrence of order 46</a>
%F A229684 Empirical recurrence of order 46 (see link above).
%e A229684 Some solutions for n=3:
%e A229684   0 0 1 1 1 0 1      0 0 1 0 1 0 1      0 1 1 2 1 2 1
%e A229684   1 0 2 0 2 0 1      2 0 1 0 1 0 1      2 0 0 0 0 0 0
%e A229684   0 0 1 0 2 0 1      2 2 2 0 1 2 2      2 1 1 1 2 1 0
%K A229684 nonn
%O A229684 1,2
%A A229684 _R. H. Hardin_, Sep 27 2013