cp's OEIS Frontend

A229603 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.

%I A229603 #8 Apr 27 2021 21:27:42
%S A229603 12,925,20714,362100,5655616,82613904,1153135492,15568071652,
%T A229603 204858459714,2641246065146,33490766408662,418803158565406,
%U A229603 5175912161534684,63325575352273052,768005500079367536
%N A229603 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.
%C A229603 Column 5 of A229606.
%H A229603 R. H. Hardin, <a href="/A229603/b229603.txt">Table of n, a(n) for n = 1..210</a>
%F A229603 Empirical: a(n) = 47*a(n-1) - 915*a(n-2) + 9649*a(n-3) - 60959*a(n-4) + 242397*a(n-5) - 616481*a(n-6) + 977203*a(n-7) - 836412*a(n-8) + 41816*a(n-9) + 793688*a(n-10) - 1000320*a(n-11) + 656832*a(n-12) - 262080*a(n-13) + 63744*a(n-14) - 8704*a(n-15) + 512*a(n-16) for n > 17.
%e A229603 Some solutions for n=3:
%e A229603   0 1 2 2 1      0 1 0 1 2      0 1 0 2 1      0 1 2 0 1
%e A229603   2 0 0 1 2      1 2 0 2 1      1 0 1 0 1      1 2 1 1 2
%e A229603   0 2 1 2 0      2 0 1 2 0      1 2 0 1 2      0 1 0 0 1
%Y A229603 Cf. A229606.
%K A229603 nonn
%O A229603 1,1
%A A229603 _R. H. Hardin_, Sep 26 2013