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%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_