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 A325115 #14 Feb 02 2021 17:04:50 %S A325115 0,0,0,1,6,35,260,2934,53768,1707627,96648020,9886429142, %T A325115 1842161884708,629505254017556,397043155634566696, %U A325115 464930596621838689900,1016021072554513545893264,4162479064042009639168386134,32096876145378032622994745784856 %N A325115 Number of simple graphs on n unlabeled nodes with exactly 1 endpoint (node of degree 1). %H A325115 Andrew Howroyd, <a href="/A325115/b325115.txt">Table of n, a(n) for n = 1..50</a> %Y A325115 Column k=1 of A327371. %Y A325115 Cf. A277072 (labeled case), A325125. %K A325115 nonn %O A325115 1,5 %A A325115 _Andrew Howroyd_, Sep 04 2019 %E A325115 Terms a(11) and beyond from _Andrew Howroyd_, Feb 02 2021