login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030269 Number of nonisomorphic disconnected partial lattices. 0

%I #6 Dec 19 2015 12:30:39

%S 0,0,1,2,6,18,69,287,1397,7634,46972,321014,2416305,19840547,

%T 176267022,1681915809,17127587977,185127766583

%N Number of nonisomorphic disconnected partial lattices.

%C A partial lattice is a poset where every pair of points has a unique least upper (greatest lower) bound or has no upper (lower) bound.

%Y a(n) = A006966(n-2) - A030268(n).

%K nonn,hard

%O 0,4

%A _Christian G. Bower_, revised Dec 28 2000

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 13:41 EDT 2024. Contains 371914 sequences. (Running on oeis4.)