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 A323464 #27 Jan 09 2025 13:06:29 %S A323464 1,2,3,6,20,40,80,1975,3999,15995,39999 %N A323464 Values of n at which A323484 reaches a new record. %C A323464 The corresponding numbers of steps are 0, 1, 11, 12, 13, 14, 15, 16, 17. %H A323464 Eric Angelini, Lars Blomberg, Charlie Neder, Remy Sigrist, and N. J. A. Sloane, <a href="http://arxiv.org/abs/1902.01444">"Choix de Bruxelles": A New Operation on Positive Integers</a>, arXiv:1902.01444, Feb 2019; Fib. Quart. 57:3 (2019), 195-200. %H A323464 Eric Angelini, Lars Blomberg, Charlie Neder, Remy Sigrist, and N. J. A. Sloane,, <a href="/A307635/a307635.pdf">"Choix de Bruxelles": A New Operation on Positive Integers</a>, Local copy. %e A323464 a(4)=20 refers to the fact that it takes 13 steps to reach 100 from 5 using the Choix de Bruxelles (version 2) operation, and all multiples of 5 less than 100 can be reached from 5 in fewer than 13 steps. %Y A323464 Cf. A323286, A323460, A323454, A323484. %K A323464 nonn,base,more %O A323464 1,2 %A A323464 _N. J. A. Sloane_, Jan 23 2019 %E A323464 a(10) from _Michael S. Branicky_, Oct 05 2024 %E A323464 a(11) from _Michael S. Branicky_, Oct 11 2024