This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A233079 #8 Oct 07 2018 08:36:16 %S A233079 41,4631,529862,60632429,6938214854,793945203881,90851753687090, %T A233079 10396235291448605,1189649113515482414,136132453105625552657, %U A233079 15577740173984637831242,1782572659143148713774245 %N A233079 Number of n X 5 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order. %H A233079 R. H. Hardin, <a href="/A233079/b233079.txt">Table of n, a(n) for n = 1..210</a> %F A233079 Empirical: a(n) = 118*a(n-1) - 411*a(n-2) + 294*a(n-3). %F A233079 Empirical g.f.: x*(41 - 207*x + 255*x^2) / ((1 - x)*(1 - 117*x + 294*x^2)). - _Colin Barker_, Oct 07 2018 %e A233079 Some solutions for n=2: %e A233079 ..0..0..1..3..3....0..0..1..0..0....0..0..1..0..0....0..0..0..0..1 %e A233079 ..0..1..3..3..1....2..3..2..0..0....1..1..1..1..1....0..1..1..1..0 %Y A233079 Column 5 of A233082. %K A233079 nonn %O A233079 1,1 %A A233079 _R. H. Hardin_, Dec 03 2013