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 A361991 #14 Jun 11 2023 12:19:53 %S A361991 0,1,2,8,24,121 %N A361991 Number of prime knotoids in a sphere with n crossings. %C A361991 Knotoids are represented by diagrams in a surface which differ from the usual knot diagrams in that the underlying curve is a segment rather than a circle. %H A361991 Dimos Goundaroulis, Julien Dorier and Andrzej Stasiak, <a href="https://arxiv.org/abs/1902.07277">A systematic classification of knotoids on the plane and on the sphere</a>, arXiv:1902.07277 [math.GT], 2019. %H A361991 Vladimir Turaev, <a href="https://arxiv.org/abs/1002.4133">Knotoids</a>, arXiv:1002.4133 [math.GT], 2010. %Y A361991 Cf. A002863. %K A361991 nonn,more %O A361991 1,3 %A A361991 _Lorenzo Sauras Altuzarra_, Apr 02 2023