|
Search: id:A008989
|
|
|
| A008989 |
|
Number of immersions of unoriented circle into unoriented sphere with n double points. |
|
+0
1
|
| |
|
|
OFFSET
|
0,3
|
|
|
REFERENCES
|
V. I. Arnold, Topological Invariants of Plane Curves..., American Math. Soc., 1994, p. 18.
|
|
CROSSREFS
|
Sequence in context: A044045 A150118 A150119 this_sequence A057240 A079564 A079453
Adjacent sequences: A008986 A008987 A008988 this_sequence A008990 A008991 A008992
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
EXTENSIONS
|
Two more terms from Guy H. Valette (guy.valette(AT)skynet.be), Feb 09 2004
|
|
|
Search completed in 0.002 seconds
|
