Number of irreducible indecomposable spherical curves with n crossings (only ordinary double points), the circle is not oriented, the sphere is oriented (UO case).
A264760
Number of irreducible indecomposable spherical curves with n crossings (only ordinary double points), the circle is not oriented, the sphere is oriented (UO case).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =4a(6) =12a(7) =41a(8) =161a(9) =658a(10) =2993a(11) =13974a(12) =67945a(13) =338644a(14) =1720544a(15) =8908579a(16) =46775073a(17) =248932094a(18) =1340079951a(19) =7289000415a(20) =40019815872a(21) =221582832331a(22) =123635832467
External references
- oeis: A264760