This site is supported by donations to The OEIS Foundation.



Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

(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 | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 8 11:15 EST 2016. Contains 278939 sequences.