%I
%S 1,1,1,7,75,1531,50673,2613703,202180723,22853355895,3701983130913,
%T 846741042881779,270316009546766571,119343586350194910211,
%U 72325998629777739416209,59798727157327673157936319
%N Reduced partially ordered sets (posets) with n labeled elements.
%D F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and TreeLike Structures, Cambridge, 1998, p. 57 (1.4.70).
%H <a href="/index/Pos#posets">Index entries for sequences related to posets</a>
%F E.g.f. A(x)=B(x/(1+x)) where B(x) is e.g.f. of A001035.
%F E.g.f. A(x)=exp(B(x)) where B(x) is e.g.f. of A066303.
%K nonn
%O 0,4
%A _Christian G. Bower_, Dec 12 2001
