OFFSET
0,3
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..2055
Emeric Deutsch, A bijection on ordered trees and its consequences, J. Comb. Theory, A, 90, 210-215, 2000.
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 02 2007
STATUS
approved