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 A008984 #20 Jan 22 2025 00:05:47 %S A008984 1,1,3,10,35,133,538,2144,8643,34690,139122,556618 %N A008984 Number of immersions of the oriented circle into the oriented plane with n double points and index n-1. %D A008984 V. I. Arnold, Topological Invariants of Plane Curves and Caustics, American Math. Soc., 1994, p. 18. %Y A008984 Cf. A008980, A008981, A008982, A008983, A008985, A054993. %K A008984 nonn,nice,more %O A008984 0,3 %A A008984 _N. J. A. Sloane_ %E A008984 Name corrected by _Andrey Zabolotskiy_, Oct 22 2023 %E A008984 a(6)-a(11) from _Andrey Zabolotskiy_, Jan 19 2025