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 A193490 #8 Feb 17 2018 21:12:25 %S A193490 0,0,0,0,0,0,1,1,8,15,70,165,608,1601,5259,14564,45040,127521,381691, %T A193490 1090130,3202382,9171574,26642413,76312777,220134939,629965221, %U A193490 1808975528,5170502225,14801940226,42257089390 %N A193490 Number of rooted trees with n nodes and omega-valency 5. %C A193490 See A003120 for definitions. %H A193490 J.-C. Arditti, <a href="http://dx.doi.org/10.1016/0012-365X(73)90135-0">Dénombrement des arborescences dont le graphe de comparabilité est Hamiltonien</a>, Discrete Math., 5 (1973), 189-200. %Y A193490 Cf. A003120, A193487, A193488, A193489, A193491. %K A193490 nonn %O A193490 1,9 %A A193490 _N. J. A. Sloane_, Jul 27 2011