Trees and Orderings

[franktaw at netscape.net]

(Sorry, I forgot to put a subject on this.)

http://www.research.att.com/~njas/sequences/A000669 is "Number of 
series-reduced planted trees with n leaves. ... also the number of 
total orderings of n unlabeled points." 
 
The number of total orderings of n unlabeled points is 1. 
 
What is this portion of the description intended to mean? 
 
Franklin T. Adams-Watters 

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