Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 Sep 07 2013 13:49:09
%S 0,0,0,1,20,65,350
%N Erroneous version of A000453.
%C This is column k=4 of the table on that page.
%D M. Barbut and B. Monjardet, Ordre et classification - algèbre et combinatoire - tome II, Série Méthodes Mathématiques des Sciences de l'Homme, Hachette, Paris, 1970, page 101.
%e The fifth term (20) is a typo for 10.
%e There is another error in this table in the book (entry for k=6, n=7 should be 21 instead of 20) leading to an incorrect row sum of 876 instead of 877 for the n=7 Bell number.
%Y Cf. A000453.
%K dead
%O 1,5
%A _Olivier Gérard_, Sep 05 2013 based on emails by Antreas P. Hatzipolakis (anopolis72 (AT) gmail.com) and _R. J. Mathar_