Triangle T(n,k) giving number of immersions of the oriented circle into the oriented plane with n double points and index k, k = -n-1, -n+1, ..., n-1, n+1.
A008985
Triangle T(n,k) giving number of immersions of the oriented circle into the oriented plane with n double points and index k, k = -n-1, -n+1, ..., n-1, n+1.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =3a(9) =2a(10) =4a(11) =10a(12) =11a(13) =10a(14) =4a(15) =10a(16) =35a(17) =57a(18) =57a(19) =35a(20) =10a(21) =26a(22) =133a(23) =290a(24) =364a(25) =290a(26) =133a(27) =26a(28) =80a(29) =538
External references
- oeis: A008985