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 A323928 #8 Feb 10 2019 17:17:21 %S A323928 0,0,0,1,6,27,132,644,3165 %N A323928 Polycyclic aromatic hydrocarbons (for precise definition see He and He, 1986). %H A323928 Wenchen He and Wenjie He, <a href="https://doi.org/10.1016/S0040-4020(01)82078-0">Generation and enumeration of planar polycyclic aromatic hydrocarbons</a>, Tetrahedron 42.19 (1986): 5291-5299. See Table 1. %Y A323928 Cf. A003104, A323923-A323930. %K A323928 nonn,more %O A323928 1,5 %A A323928 _N. J. A. Sloane_, Feb 09 2019