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 A232332 #8 Oct 04 2018 11:50:28 %S A232332 10,82,628,4906,38986,312276,2510674,20221026,162993780,1314329242, %T A232332 10600203674,85498798420,689639995266,5562789156722,44871062410868, %U A232332 361944328742026,2919563842456426,23550196645340116,189963983083385394 %N A232332 Number of n X 5 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally, with no adjacent elements equal. %H A232332 R. H. Hardin, <a href="/A232332/b232332.txt">Table of n, a(n) for n = 1..210</a> %F A232332 Empirical: a(n) = 11*a(n-1) - 21*a(n-2) - 20*a(n-3) - 12*a(n-4) for n>5. %F A232332 Empirical g.f.: 2*x*(5 - 14*x - 32*x^2 - 40*x^3 - 16*x^4) / (1 - 11*x + 21*x^2 + 20*x^3 + 12*x^4). - _Colin Barker_, Oct 04 2018 %e A232332 Some solutions for n=6: %e A232332 ..0..1..2..1..0....0..1..2..1..2....0..1..2..1..0....0..1..2..1..0 %e A232332 ..2..1..0..1..2....0..1..2..1..2....0..1..2..1..2....2..1..2..1..2 %e A232332 ..2..1..2..1..0....0..1..2..1..2....0..1..0..1..0....0..1..2..1..0 %e A232332 ..0..1..2..1..0....2..1..0..1..0....2..1..2..1..0....0..1..0..1..2 %e A232332 ..0..1..2..1..0....2..1..2..1..0....0..1..0..1..2....0..1..2..1..0 %e A232332 ..0..1..0..1..2....0..1..0..1..2....2..1..0..1..0....0..1..0..2..1 %Y A232332 Column 5 of A232335. %K A232332 nonn %O A232332 1,1 %A A232332 _R. H. Hardin_, Nov 22 2013