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 A222923 #6 Jul 23 2025 03:16:13 %S A222923 41,68076,149478882,352790675074,829048065675262,1950399182366908036, %T A222923 4587672845137864487256,10791321299165218217699322, %U A222923 25383677827763449530156884274,59708321150765046377817427875602 %N A222923 Number of nX5 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order. %C A222923 Column 5 of A222924 %H A222923 R. H. Hardin, <a href="/A222923/b222923.txt">Table of n, a(n) for n = 1..12</a> %e A222923 Some solutions for n=3 %e A222923 ..0..0..1..1..0....0..0..1..0..2....0..0..1..2..0....0..0..1..0..2 %e A222923 ..0..0..1..0..2....0..0..1..3..0....0..0..1..3..3....0..0..1..0..3 %e A222923 ..2..3..4..2..4....1..3..0..1..1....1..3..4..3..3....1..3..4..1..0 %K A222923 nonn %O A222923 1,1 %A A222923 _R. H. Hardin_ Mar 09 2013