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!)
A246988 Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3. 1

%I #7 Mar 26 2023 15:55:40

%S 1,4,12,25,50,91,164

%N Number of isomorphism classes of oriented matroids of dimension n and cardinality n+3.

%H Lukas Finschi, <a href="https://finschi.com/math/om/">Homepage of Oriented Matroids</a>

%Y A diagonal of A063804.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, Sep 17 2014

%E a(4) corrected by _Andrey Zabolotskiy_, Mar 26 2023

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 March 29 02:13 EDT 2024. Contains 371264 sequences. (Running on oeis4.)