OFFSET
1,2
LINKS
Lars Blomberg, Table of n, a(n) for n = 1..3000
FORMULA
k appears A002620(k+1) times.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 23 2018
EXTENSIONS
More terms from Lars Blomberg, Apr 25 2019
STATUS
approved