Number of immersions of unoriented circle into oriented sphere with 2n double points such that two different choices of orientation of the circle are not related by geotopy.
A268564
Number of immersions of unoriented circle into oriented sphere with 2n double points such that two different choices of orientation of the circle are not related by geotopy.
Terms
- a(0) =0a(1) =1a(2) =16a(3) =555a(4) =27155a(5) =1624602a(6) =110848296a(7) =8306916404a(8) =667683029392
External references
- oeis: A268564