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 A224048 #6 Jul 23 2025 04:57:27 %S A224048 610,59792,1801402,28403642,310514900,2701569493,20096076442, %T A224048 133729094355,821109158656,4743773544158,26052580835518, %U A224048 136551839375912,683560425650120,3267176210453459,14908991892646144,64985125266087385 %N A224048 Number of nX6 0..3 arrays with rows and columns unimodal and antidiagonals nondecreasing. %C A224048 Column 6 of A224050 %H A224048 R. H. Hardin, <a href="/A224048/b224048.txt">Table of n, a(n) for n = 1..34</a> %e A224048 Some solutions for n=3 %e A224048 ..0..0..0..0..2..0....0..0..0..0..2..0....0..0..0..0..1..0....0..0..0..0..1..1 %e A224048 ..0..0..1..3..1..0....0..0..0..3..1..1....0..0..0..3..3..3....0..2..2..1..1..0 %e A224048 ..0..2..3..2..0..0....0..2..3..1..1..1....0..2..3..3..3..3....2..2..2..3..1..0 %K A224048 nonn %O A224048 1,1 %A A224048 _R. H. Hardin_ Apr 01 2013