login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A101388 Number of n-vertex unlabeled digraphs without endpoints. 0

%I

%S 1,1,8,137,7704,1413982

%N Number of n-vertex unlabeled digraphs without endpoints.

%Y Cf. A100548 (labeled case), A004110, A004108, A059166, A059167.

%K more,nonn

%O 1,3

%A Goran Kilibarda, Zoran Maksimovic, _Vladeta Jovovic_, Jan 14 2005

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 December 20 04:40 EST 2014. Contains 252241 sequences.