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 A241107 #6 Jul 23 2025 11:09:30 %S A241107 32,1216,40418,1333934,44030862,1454236806,48054344508,1586763763374, %T A241107 52415988665902,1731396543937826,57192293520907518, %U A241107 1889201414043365704,62405079297467322902,2061398474689109752446,68093252520609897541958 %N A241107 Number of nX7 0..2 arrays with no element equal to one or three horizontal or vertical neighbors, with new values 0..2 introduced in row major order. %C A241107 Column 7 of A241108 %H A241107 R. H. Hardin, <a href="/A241107/b241107.txt">Table of n, a(n) for n = 1..58</a> %e A241107 Some solutions for n=3 %e A241107 ..0..1..2..1..2..1..2....0..1..1..2..0..2..0....0..1..0..2..1..0..1 %e A241107 ..2..2..1..0..1..0..1....2..1..1..1..2..0..2....1..0..2..1..0..1..2 %e A241107 ..2..2..0..1..0..1..0....1..0..1..1..0..2..1....0..2..1..0..1..0..1 %K A241107 nonn %O A241107 1,1 %A A241107 _R. H. Hardin_, Apr 16 2014