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 A209462 #9 Jul 22 2025 21:44:17 %S A209462 52,10676,7487423,8012278798,9920302864598,12804264249973850, %T A209462 16716447554895729642,21891626720034635715808, %U A209462 28693157762856925081512056,37616484231411781150938946180,49317969569601496772488372952619 %N A209462 Number of nX5 0..6 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..6 introduced in row major order. %C A209462 Column 5 of A209465 %H A209462 R. H. Hardin, <a href="/A209462/b209462.txt">Table of n, a(n) for n = 1..210</a> %e A209462 Some.solutions.for.n=4 %e A209462 ..0..0..0..0..0....0..0..1..2..2....0..0..0..0..0....0..0..0..0..0 %e A209462 ..1..2..1..2..3....1..2..0..0..1....1..2..1..2..1....1..2..3..1..2 %e A209462 ..0..0..0..0..0....0..0..1..2..0....0..0..0..2..0....1..0..0..0..0 %e A209462 ..2..1..2..1..2....3..1..2..4..0....1..2..1..1..0....1..2..1..2..3 %K A209462 nonn %O A209462 1,1 %A A209462 _R. H. Hardin_ Mar 09 2012