|
Search: id:A134201
|
|
|
| A134201 |
|
Number of rigid hypergroups of order n. |
|
+0
2
|
|
| 1, 2, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
REFERENCES
|
R. Bayon and N. Lygeros, Hyperstructures and Automorphism Groups, submitted.
F. Marty. Sur une generalisation de la notion de groupe. In Proc. 8th Congr. des Mathematiciens Scandinaves, Stockholm, pp. 45-49, 1934.
Th. Vougiouklis, The fundamental relation in hyperrings: The general hyperfield, Fourth Int. Congress Algebraic Hyperstructures and Appl. (AHA), 1991, pp. 203-211.
|
|
FORMULA
|
a(1)=1, a(2)=2, a(n)=6 for n>2.
|
|
CROSSREFS
|
Cf. A108089, A132590, A134202.
Sequence in context: A097466 A141624 A134413 this_sequence A137479 A048765 A103643
Adjacent sequences: A134198 A134199 A134200 this_sequence A134202 A134203 A134204
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Roman Bayon (roman.bayon(AT)gmail.com), Oct 14 2007
|
|
|
Search completed in 0.002 seconds
|
