OFFSET
0,5
COMMENTS
When permutation A263273 is viewed as a binary tree, a(n) gives the parent node of node containing n, for all n >= 1.
Each n occurs exactly twice in the sequence.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..16384
CROSSREFS
KEYWORD
AUTHOR
Antti Karttunen, Dec 18 2015
STATUS
approved