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Values of n at which A323484 reaches a new record.
1

%I #27 Jan 09 2025 13:06:29

%S 1,2,3,6,20,40,80,1975,3999,15995,39999

%N Values of n at which A323484 reaches a new record.

%C The corresponding numbers of steps are 0, 1, 11, 12, 13, 14, 15, 16, 17.

%H 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 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 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 Cf. A323286, A323460, A323454, A323484.

%K nonn,base,more

%O 1,2

%A _N. J. A. Sloane_, Jan 23 2019

%E a(10) from _Michael S. Branicky_, Oct 05 2024

%E a(11) from _Michael S. Branicky_, Oct 11 2024