OFFSET
0,2
COMMENTS
Also, largest number that can be obtained by starting with 1 and applying the original "Choix de Bruxelles" version 1 operation (as defined in A323286) at most n times.
a(n) is the largest number that can be obtained by applying Choix de Bruxelles (version 2) to all the numbers that can be reached from 1 by applying it n-1 times.
a(n+1) >= A323460(a(n)) (but equality does not always hold). See A307635. - Rémy Sigrist, Jan 15 2019
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.
FORMULA
a(n+4) = decimal concatenation of 8112 and a(n) for n >= 10.
EXAMPLE
After applying Choix de Bruxelles (version 2) 4 times to 1, we have the numbers {1,2,4,8,16}. Applying it a fifth time we get the additional numbers {13,26,32,112}, so a(5) = 112.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Jan 15 2019
EXTENSIONS
a(9)-a(16) from Rémy Sigrist, Jan 15 2019. Further terms from N. J. A. Sloane, May 01 2019
STATUS
approved