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 A241129 #6 Jul 23 2025 11:11:13 %S A241129 82,11876,1792237,272418756,41661463219,6369134821236,973866422990563, %T A241129 148910067386335603,22769250775360645781,3481561098182183872590, %U A241129 532352524971939702558325,81400042312275755768027497 %N A241129 Number of nX6 0..2 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..2 introduced in row major order. %C A241129 Column 6 of A241130 %H A241129 R. H. Hardin, <a href="/A241129/b241129.txt">Table of n, a(n) for n = 1..57</a> %e A241129 Some solutions for n=2 %e A241129 ..0..1..1..1..2..1....0..1..0..2..0..2....0..1..0..1..0..1....0..1..2..1..2..1 %e A241129 ..0..2..1..0..1..0....1..0..2..0..0..0....1..0..0..0..1..2....2..2..0..0..2..0 %K A241129 nonn %O A241129 1,1 %A A241129 _R. H. Hardin_, Apr 16 2014