OFFSET
1,2
COMMENTS
This sequence can be represented as a binary tree. Each left hand child is produced as A014132(n) and each right hand child as A000217(1+n), when a parent contains n >= 1:
1
................../ \..................
2 3
4......../ \........6 5......../ \.......10
/ \ / \ / \ / \
/ \ / \ / \ / \
/ \ / \ / \ / \
7 15 9 28 8 21 14 66
11 36 20 136 13 55 35 435 12 45 27 253 19 120 77 2278
etc.
LINKS
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 18 2015
STATUS
approved