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 A243392 #14 May 06 2021 21:24:05 %S A243392 2,3,4,12,22,68,166,534,1589,5464,18579,68320,255424,1000852,4018156, %T A243392 16671976,70890940,309439942,1381815168,6310880471,29428287639, %U A243392 140012980007,678970863717,3353545264060,16857749613964,86191265140699,447951112379963,2365177154077186 %N A243392 Number of isomorphism classes of connected 3-regular simple graphs of order 2n with loops and semi-edges allowed. %H A243392 G. Brinkmann, N. Van Cleemput, T. Pisanski, <a href="http://dx.doi.org/10.1016/j.tcs.2012.01.018">Generation of various classes of trivalent graphs</a>, Theoretical Computer Science 502, 2013, pp.16-29. %Y A243392 Differs from A243391 only in the first term. %K A243392 nonn %O A243392 1,1 %A A243392 _Nico Van Cleemput_, Jun 04 2014 %E A243392 a(23)-a(28) from _Andrew Howroyd_, May 06 2021