cp's OEIS Frontend

A229531 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.

%I A229531 #8 Apr 27 2021 20:58:46
%S A229531 16,112,1588,19276,221096,2451728,26566266,283010776,2975590424,
%T A229531 30959068528,319352065652,3270635802440,33292532186562,
%U A229531 337120240897408,3398161294369868,34116704260522692,341314436219045264
%N A229531 Number of defective 3-colorings of an n X 5 0..2 array connected horizontally, diagonally and antidiagonally with exactly one mistake, and colors introduced in row-major 0..2 order.
%C A229531 Column 5 of A229534.
%H A229531 R. H. Hardin, <a href="/A229531/b229531.txt">Table of n, a(n) for n = 1..210</a>
%F A229531 Empirical: a(n) = 28*a(n-1) - 286*a(n-2) + 1290*a(n-3) - 2373*a(n-4) + 304*a(n-5) + 3551*a(n-6) - 2846*a(n-7) - 546*a(n-8) + 1308*a(n-9) - 505*a(n-10) + 76*a(n-11) - 4*a(n-12) for n > 13.
%e A229531 Some solutions for n=4:
%e A229531   0 1 2 1 0      0 1 2 1 2      0 1 2 1 2      0 1 0 2 0
%e A229531   0 1 2 0 2      2 1 2 1 2      2 1 0 1 0      2 1 2 1 0
%e A229531   2 1 2 1 2      2 1 2 1 0      0 1 2 1 2      0 1 0 1 0
%e A229531   2 0 2 1 2      2 1 2 0 2      2 0 2 1 0      2 1 0 1 0
%Y A229531 Cf. A229534.
%K A229531 nonn
%O A229531 1,1
%A A229531 _R. H. Hardin_, Sep 25 2013