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 A275225 #4 Jul 20 2016 18:26:29 %S A275225 41,1296,1885,9075,64248,460034,3334854,24595019,181187962,1332436071, %T A275225 9810172225,72273272964,532374394904,3921375107766,28886433275447, %U A275225 212793855415512,1567545471803795,11547327991701749,85063839496736654 %N A275225 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,0) and new values introduced in order 0..2. %C A275225 Column 5 of A275228. %H A275225 R. H. Hardin, <a href="/A275225/b275225.txt">Table of n, a(n) for n = 1..210</a> %H A275225 R. H. Hardin, <a href="/A275225/a275225.txt">Empirical recurrence of order 81</a> %F A275225 Empirical recurrence of order 81 (see link above) %e A275225 Some solutions for n=4 %e A275225 ..0..1..0..1..0. .0..1..0..1..0. .0..1..2..1..0. .0..0..0..1..0 %e A275225 ..2..0..1..2..2. .1..0..2..2..1. .1..0..1..0..1. .2..1..1..2..1 %e A275225 ..0..2..2..1..0. .0..2..0..1..2. .0..1..0..1..0. .1..2..2..1..2 %e A275225 ..2..0..1..0..1. .2..0..1..0..0. .1..2..1..2..2. .0..0..0..0..1 %Y A275225 Cf. A275228. %K A275225 nonn %O A275225 1,1 %A A275225 _R. H. Hardin_, Jul 20 2016