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 A223849 #5 Jul 23 2025 04:35:36 %S A223849 1163,1352569,570145144,106061178908,10609537390768,655695544507798, %T A223849 27578655986218632,846185728339283486 %N A223849 Number of nX7 0..3 arrays with rows and columns unimodal. %C A223849 Column 7 of A223850 %e A223849 Some solutions for n=3 %e A223849 ..0..0..0..0..0..2..2....0..0..0..0..1..0..0....0..0..0..0..0..1..0 %e A223849 ..0..0..0..0..1..2..1....0..0..0..0..3..3..1....0..0..0..0..0..1..0 %e A223849 ..0..0..0..0..0..0..1....0..0..0..0..0..1..1....0..0..0..0..0..3..1 %K A223849 nonn %O A223849 1,1 %A A223849 _R. H. Hardin_ Mar 27 2013