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 A221124 #5 Jul 23 2025 01:44:25 %S A221124 144,185164,229006550,282454178707,348270153038959,429398881440049645, %T A221124 529420758866821620887 %N A221124 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor. %C A221124 Column 6 of A221125 %e A221124 Some solutions for n=3 %e A221124 ..0..1..1..1..4..1....0..1..1..0..2..2....0..1..1..2..1..0....0..1..1..0..3..0 %e A221124 ..0..3..1..1..0..1....0..3..1..2..0..2....0..3..3..2..0..0....0..3..3..3..1..0 %e A221124 ..0..0..2..0..0..2....0..0..1..1..2..0....0..0..2..0..3..0....0..0..0..1..2..0 %K A221124 nonn %O A221124 1,1 %A A221124 _R. H. Hardin_ Jan 02 2013