OFFSET
0,3
COMMENTS
This sequence can be represented as a binary tree. Each left hand child is produced as A153880(n), and each right hand child as A273670(n), when their parent contains n >= 1:
0
|
...................1...................
2 3
6......../ \........4 8......../ \........5
/ \ / \ / \ / \
/ \ / \ / \ / \
/ \ / \ / \ / \
24 10 12 7 30 13 14 9
120 34 36 16 48 18 26 11 144 42 50 19 54 20 32 15
etc.
LINKS
PROG
CROSSREFS
KEYWORD
nonn,base,tabf
AUTHOR
Antti Karttunen, May 30 2016
STATUS
approved