OFFSET
1,2
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..10000 (terms 1..239 from Hans Havermann, terms 240..669 from Lars Blomberg)
Rémy Sigrist, Log-plot of first 5000 terms.
Rémy Sigrist, C++ program for A307630.
PROG
(C++) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 25 2019
EXTENSIONS
More terms from Hans Havermann, Apr 25 2019
STATUS
approved