OFFSET
1,2
COMMENTS
Initially, seems to be about 0.136 times n. Maybe constant times n/log(n)? It would be nice to know more. - N. J. A. Sloane, Oct 10 2017
a(10^12) = 90689534032. - Benjamin Chaffin, Sep 11 2019
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..10000
Benjamin Chaffin, Plot of a(n)/n for the first 10^12 terms
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 19 2010
STATUS
approved