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 A233153 #8 Oct 08 2018 10:20:08 %S A233153 96,1944,40392,842616,17587584,367125912,7663517136,159971190624, %T A233153 3339300422232,69705848287656,1455066835631064,30373627879088352, %U A233153 634030855481713176,13235005291610993904,276272619155126818272 %N A233153 Number of n X 6 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally. %H A233153 R. H. Hardin, <a href="/A233153/b233153.txt">Table of n, a(n) for n = 1..210</a> %F A233153 Empirical: a(n) = 25*a(n-1) - 90*a(n-2) + 81*a(n-3). %F A233153 Empirical g.f.: 24*x*(4 - 19*x + 18*x^2) / (1 - 25*x + 90*x^2 - 81*x^3). - _Colin Barker_, Oct 08 2018 %e A233153 Some solutions for n=3: %e A233153 ..0..0..1..2..2..2....1..0..1..2..2..1....0..1..0..1..2..1....2..1..0..1..2..2 %e A233153 ..0..0..1..2..1..0....1..2..2..2..2..2....2..1..0..1..2..1....2..1..2..1..2..2 %e A233153 ..1..0..1..0..1..2....1..2..1..2..2..1....0..1..2..1..2..2....2..2..2..2..1..0 %Y A233153 Column 6 of A233155. %K A233153 nonn %O A233153 1,1 %A A233153 _R. H. Hardin_, Dec 05 2013