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 A283315 #14 Jul 09 2025 04:43:21 %S A283315 0,0,0,1,2,4,9,17,43 %N A283315 Total number of nontrivial knots (prime or composite) with <= n crossings. %Y A283315 Equals A283314(n) - 1. %K A283315 nonn,more %O A283315 0,5 %A A283315 _N. J. A. Sloane_, Mar 08 2017, following a suggestion from _Daniel Forgues_ %E A283315 a(8) corrected from A086825 by _Kyle Miller_, Oct 14 2020