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 A007020 M1437 #17 Sep 17 2017 16:30:44 %S A007020 1,1,1,2,5,13,33,85,199,445,947,1909,3713,7006,12765,22764,39540 %N A007020 Maximal planar degree sequences with n nodes. %C A007020 The number of distinct degree sequences occurring in the polyhedra counted by A000109. - _Sean A. Irvine_, Sep 17 2017 %D A007020 M. B. Dillencourt, Polyhedra of small orders and their Hamiltonian properties. Tech. Rep. 92-91, Info. and Comp. Sci. Dept., Univ. Calif. Irvine, 1992. %D A007020 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A007020 M. B. Dillencourt, <a href="http://dx.doi.org/10.1006/jctb.1996.0008">Polyhedra of small orders and their Hamiltonian properties</a>, Journal of Combinatorial Theory, Series B, Volume 66, Issue 1, January 1996, Pages 87-122. %Y A007020 Cf. A000109. %K A007020 nonn,more %O A007020 3,4 %A A007020 _N. J. A. Sloane_ %E A007020 a(17)-a(19) from _Sean A. Irvine_, Sep 17 2017