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 A289655 #11 Jul 29 2017 04:19:04 %S A289655 0,1,2,5,18,74,371,2178 %N A289655 Subset of A008989 containing one or more simple loops. %C A289655 It appears (although it is not certain) that A268571(n) = A008989(n) - a(n). %H A289655 Guy Valette, <a href="http://dx.doi.org/10.1007/s40598-016-0049-3">A Classification of Spherical Curves Based on Gauss Diagrams</a>, Arnold Math. J. (2016) 2:383-405, DOI 10.1007/s40598-016-0049-3. %Y A289655 Cf. A008989, A268571. %K A289655 nonn,more %O A289655 0,3 %A A289655 _N. J. A. Sloane_, Jul 17 2017