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 A224406 #8 Aug 30 2018 06:07:47 %S A224406 16,101,465,1928,7812,31710,129402,529846,2172346,8908986,36534670, %T A224406 149811438,614276002,2518688490,10327233902,42344211246,173621959826, %U A224406 711894378346,2918949452350,11968441441998,49073678703842 %N A224406 Number of n X 5 0..1 arrays with rows unimodal and antidiagonals nondecreasing. %C A224406 Column 5 of A224409. %H A224406 R. H. Hardin, <a href="/A224406/b224406.txt">Table of n, a(n) for n = 1..210</a> %F A224406 Empirical: a(n) = 6*a(n-1) - 9*a(n-2) + 4*a(n-3) + 2*a(n-4) + 8*a(n-5). %F A224406 Empirical g.f.: x*(1 - x)*(16 + 21*x + 24*x^2 + 7*x^3) / (1 - 6*x + 9*x^2 - 4*x^3 - 2*x^4 - 8*x^5). - _Colin Barker_, Aug 30 2018 %e A224406 Some solutions for n=3: %e A224406 ..0..0..1..0..0....1..0..0..0..0....0..0..0..1..0....0..1..1..1..1 %e A224406 ..1..1..1..0..0....0..0..1..0..0....0..0..1..0..0....1..1..1..1..0 %e A224406 ..1..1..1..0..0....1..1..1..0..0....0..1..1..1..0....1..1..1..1..1 %Y A224406 Cf. A224409. %K A224406 nonn %O A224406 1,1 %A A224406 _R. H. Hardin_, Apr 05 2013