Sum over the genera g of the number of immersions of an oriented circle with n crossing in an oriented surface of genus g.
A260296
Sum over the genera g of the number of immersions of an oriented circle with n crossing in an oriented surface of genus g.
Terms
- a(0) =1a(1) =4a(2) =22a(3) =218a(4) =3028a(5) =55540a(6) =1235526a(7) =32434108a(8) =980179566a(9) =33522177088
External references
- oeis: A260296