OFFSET
1,2
COMMENTS
The corresponding numbers of steps are 0, 1, 11, 12, 13, 14, 15, 16.
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 [math.NT], Feb 2019; Fib. Quart. 57:3 (2019), 195-200.
EXAMPLE
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.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
N. J. A. Sloane, Jan 23 2019
EXTENSIONS
a(9) from Michael S. Branicky, Oct 01 2024
STATUS
approved