OFFSET
0,4
COMMENTS
In other words, this sequence gives the number of leading 1's in the terms of A063171.
EXAMPLE
A014486(20) = 228 (11100100 in binary), encodes the following Dyck path:
/\
/ \/\
/ \
and the first rising (left-hand side) slope has length 3, thus a(20)=3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 02 2007
STATUS
approved