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 A183481 #6 Jul 22 2025 08:59:36 %S A183481 37,5751,58333,1942323,107741253,2519745049,84056287173 %N A183481 Number of nX7 0..2 arrays with every element equal to either the sum mod 3 of its vertical neighbors or the sum mod 3 of its horizontal neighbors. %C A183481 Column 7 of A183483 %e A183481 Some solutions for 4X7 %e A183481 ..0..0..0..1..1..0..2....0..0..0..0..2..1..0....0..0..1..0..2..2..0 %e A183481 ..0..0..0..1..0..0..2....0..0..0..0..2..1..0....0..0..1..0..0..0..0 %e A183481 ..0..1..0..0..2..0..0....0..0..0..0..0..0..0....0..0..0..0..1..0..0 %e A183481 ..0..1..0..2..2..0..0....0..0..0..0..0..2..2....0..1..1..0..1..0..0 %K A183481 nonn %O A183481 1,1 %A A183481 _R. H. Hardin_ Jan 05 2011