|
Search: id:A112850
|
|
|
| A112850 |
|
Number of graph endomorphisms of undirected cycles of even length: |End(C_2n)|. |
|
+0
2
|
|
| 4, 32, 132, 576, 2540, 11112, 48076, 205952, 875196, 3695160, 15519548, 64899792, 270415652, 1123264856
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
M. A. Michels, About The Structure of Graph Endomorphisms, Diploma thesis, University of Oldenburg, Germany, 2005
|
|
FORMULA
|
|End(C_2n)| = 2n*(2+binomial(2n-1, n-1)+binomial(2n-1, n))
|
|
CROSSREFS
|
Cf. A112849.
Adjacent sequences: A112847 A112848 A112849 this_sequence A112851 A112852 A112853
Sequence in context: A088658 A088802 A123854 this_sequence A113154 A083299 A018215
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Martin Alexander Michels (martinmichels(AT)t-online.de), Sep 24 2005
|
|
|
Search completed in 0.002 seconds
|
