OFFSET
1,2
COMMENTS
Is a(n) > n for n > 10? Does lim_{n->infinity} a(n)/n exist?
a(n) <= n for n = 1, 6, 10, 20, 21, 24, 27, ... - Amiram Eldar, Nov 28 2020
MATHEMATICA
a[n_] := Module[{x = (2^n + 1)/2^n, nstep = 0}, While[!IntegerQ[x], nstep++; x *= Ceiling[x]]; nstep]; Array[a, 15] (* Amiram Eldar, Nov 28 2020 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Sep 17 2002
EXTENSIONS
a(16)-a(17) from Ryan Propper, Mar 18 2008
a(18)-a(21) from Lars Blomberg, Jan 17 2013
a(22)-a(27) from Amiram Eldar, Nov 28 2020
More terms from Jinyuan Wang, Jan 15 2022
STATUS
approved