OFFSET
0,3
EXAMPLE
A014486(27) = 696 (1010111000 in binary), encodes the following general plane tree, where the root is marked with * and nodes with even or odd distance to root with 'e's and 'o's, respectively.
.......o
.......|
.......e
.......|
...o.o.o
....\|/.
.....*..
there are four nodes marked with 'o', thus a(27)=4.
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 02 2007
STATUS
approved