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 A187927 #30 Mar 10 2018 04:07:08 %S A187927 2,13,163,2067,30953,486674,7957459,133344454,2280001754,39648557743, %T A187927 699731146514,12511186297320 %N A187927 Number of embeddings on the sphere of 2-connected planar graphs, minimum vertex degree 3, with n nodes. %C A187927 The graphs are exactly 2-connected, not at least 2-connected. The graphs were enumerated using plantri (by B.D. McKay & G. Brinkmann) for the purpose of finding compound perfect squared squares. %H A187927 Stuart Anderson, <a href="http://www.squaring.net/sq/ss/cpss/cpss.html">Compound Perfect Squared Squares</a> %H A187927 S. E. Anderson, <a href="http://www.squaring.net/downloads/cpss.pdf">Compound Perfect Squared Squares of the Order Twenties</a>, 2013. %H A187927 Gunnar Brinkmann and Brendan McKay, <a href="http://users.cecs.anu.edu.au/~bdm/plantri/plantri-guide.txt">Plantri Guide</a> %H A187927 Gunnar Brinkmann and Brendan McKay, <a href="/A007021/a007021.txt">Guide to using plantri</a> [Cached copy, with permission] %o A187927 (plantri) plantri -p -c2 -m3 -x -u -v n ; or %Y A187927 Cf. A034889, A181340, A187928, A000944. %K A187927 nonn,more,hard %O A187927 6,1 %A A187927 _Stuart E Anderson_, Mar 16 2011 %E A187927 a(15)-a(17) from _Lorenz Milla_, Oct 08 2013