OFFSET
1,2
COMMENTS
The corresponding numbers of steps are 0, 1, 11, 12, 13, 14, 15, 16, 17.
LINKS
Eric Angelini, Lars Blomberg, Charlie Neder, Remy Sigrist, and N. J. A. Sloane, "Choix de Bruxelles": A New Operation on Positive Integers, arXiv:1902.01444, Feb 2019; Fib. Quart. 57:3 (2019), 195-200.
EXAMPLE
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.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
N. J. A. Sloane, Jan 23 2019
EXTENSIONS
a(10) from Michael S. Branicky, Oct 05 2024
a(11) from Michael S. Branicky, Oct 11 2024
STATUS
approved