OFFSET
0,5
LINKS
A. Karttunen, Table of n, a(n) for n = 0..2055
EXAMPLE
A014486(19) encodes the following binary tree:
.\/
..\/.\/
...\./
Because the subtree at the right contains just one internal node and the subtree at the left contains two, we have a(19) = 1-2 = -1.
PROG
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Dec 21 2008
STATUS
approved