OFFSET
0,2
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..10000
FORMULA
a(n) <= 2*n for any n > 0.
EXAMPLE
The first terms of A060681 are: 0, 1, 2, 2, 4, 3, 6, 4, 6, 5, 10.
So: a(0) = 1, a(1) = 2, a(2) = 3, a(4) = 5, a(3) = 6, a(6) = 7, a(10) = 11.
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Apr 24 2021
STATUS
approved