OFFSET
0,3
LINKS
Robert Donaghey, Automorphisms on Catalan trees and bracketing, J. Combin. Theory, Series B, 29 (1980), 75-90.
R. P. Stanley, Exercises on Catalan and Related Numbers
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 02 2003
STATUS
approved