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 A323463 #16 Jan 09 2025 13:07:02 %S A323463 1,2,3,99,369,999,1999,9879,19979 %N A323463 Values of n at which A323454 reaches a new record. %C A323463 The corresponding numbers of steps are 0, 1, 11, 12, 13, 14, 15, 16. %H A323463 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 [math.NT], Feb 2019; Fib. Quart. 57:3 (2019), 195-200. %H A323463 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 A323463 a(4)=99 refers to the fact that it takes 12 steps to reach 99 from 1 using the Choix de Bruxelles (version 2) operation, and all numbers less than 99 (and not ending in 0 or 5) can be reached from 1 in fewer than 12 steps. %Y A323463 Cf. A323286, A343460, A323454. %K A323463 nonn,base,more %O A323463 1,2 %A A323463 _N. J. A. Sloane_, Jan 23 2019 %E A323463 a(9) from _Michael S. Branicky_, Oct 01 2024