OFFSET
0,3
COMMENTS
Each integer n appears first at position given by A014137.
LINKS
A. Karttunen, Table of n, a(n) for n = 0..2055
EXAMPLE
The terms A014486[1..8] encode the following rooted plane binary trees:
.1.......2.......3.......4.......5........6.......7.......8..
...........................\/....\/...............\/....\/...
..........\/....\/........\/......\/....\/ \/....\/......\/..
.\/......\/......\/......\/......\/......\_/......\/......\/.
thus a(1)=1, a(2)=2, a(3)=2, a(4)=3, a(5)=3, a(6)=2, a(7)=3, a(8)=3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 03 2010
STATUS
approved