OFFSET
1,1
COMMENTS
The Pfeiffer reference in the links section has nothing to do with this sequence. The A-number, A091566 for this sequence is given in the reference but it is a typo. The reference is relevant to A085628. - Geoffrey Critzer, Jul 28 2014
LINKS
G. Pfeiffer, Counting Transitive Relations, Journal of Integer Sequences, Vol. 7 (2004), Article 04.3.2.
CROSSREFS
KEYWORD
nonn,word,bref
AUTHOR
Pierre CAMI, Aug 19 2004
STATUS
approved