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 A241116 #7 Jul 23 2025 11:10:31 %S A241116 15,2614,587555,134229632,30679522712,7012241396116,1602748583683541, %T A241116 366331237082570675,83730272300093086129,19137757826895828304001, %U A241116 4374209764040662469308200,999788545392696494568265298 %N A241116 Number of nX4 0..3 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..3 introduced in row major order. %C A241116 Column 4 of A241119 %H A241116 R. H. Hardin, <a href="/A241116/b241116.txt">Table of n, a(n) for n = 1..210</a> %H A241116 R. H. Hardin, <a href="/A241116/a241116.txt">Empirical recurrence of order 74</a> %F A241116 Empirical recurrence of order 74 (see link above) %e A241116 Some solutions for n=2 %e A241116 ..0..1..1..1....0..1..2..0....0..1..2..0....0..1..1..2....0..1..2..1 %e A241116 ..2..3..2..3....2..3..2..3....0..1..0..1....1..1..2..0....2..2..2..0 %K A241116 nonn %O A241116 1,1 %A A241116 _R. H. Hardin_, Apr 16 2014