This site is supported by donations to The OEIS Foundation.



The submissions stack has been unacceptably high for several months now. Please voluntarily restrict your submissions and please help with the editing. (We don't want to have to impose further limits.)

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A066302 Reduced partially ordered sets (posets) with n labeled elements. 1


%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 Tree-Like Structures, Cambridge, 1998, pg 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified August 28 08:35 EDT 2015. Contains 261118 sequences.