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 A241136 #6 Jul 23 2025 11:11:40 %S A241136 3,56,935,19619,434444,9958520,230889822,5392206371,126282435834, %T A241136 2961490680709,69496584116858,1631338280892936,38298741469181591, %U A241136 899193676958891448,21112270301566616904,495704295580513197709 %N A241136 Number of nX5 0..2 arrays with no element equal to the same number of vertical neighbors as horizontal neighbors, with new values 0..2 introduced in row major order. %C A241136 Column 5 of A241138 %H A241136 R. H. Hardin, <a href="/A241136/b241136.txt">Table of n, a(n) for n = 1..210</a> %e A241136 Some solutions for n=4 %e A241136 ..0..0..1..1..0....0..0..0..1..1....0..0..0..1..1....0..1..0..2..2 %e A241136 ..2..2..0..0..0....1..1..2..2..2....2..1..2..2..2....0..1..0..1..1 %e A241136 ..1..0..2..2..0....2..0..0..1..1....2..1..0..1..0....2..2..2..0..0 %e A241136 ..1..0..1..1..1....2..1..1..2..2....2..1..0..1..0....0..0..0..1..1 %K A241136 nonn %O A241136 1,1 %A A241136 _R. H. Hardin_, Apr 16 2014