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 A223848 #6 Jul 23 2025 04:35:30 %S A223848 610,372100,87613063,9625018705,594861333098,23571122875874, %T A223848 655695544507798,13664368909406118,223826020405698042, %U A223848 2989255089012594574,33493784878205412870,322121609577947478872 %N A223848 Number of nX6 0..3 arrays with rows and columns unimodal. %C A223848 Column 6 of A223850 %H A223848 R. H. Hardin, <a href="/A223848/b223848.txt">Table of n, a(n) for n = 1..26</a> %e A223848 Some solutions for n=3 %e A223848 ..0..0..0..0..3..2....0..0..0..0..1..2....0..0..0..3..1..0....0..0..0..1..3..0 %e A223848 ..0..0..0..2..2..1....0..0..0..0..2..2....0..0..0..0..1..3....0..0..0..1..3..3 %e A223848 ..0..0..0..1..0..0....0..0..1..3..1..0....0..0..0..0..3..1....0..0..2..3..0..0 %K A223848 nonn %O A223848 1,1 %A A223848 _R. H. Hardin_ Mar 27 2013