Sum over the genera g of the number of immersions of an unoriented circle with n crossing in an oriented surface of genus g.
A260847
Sum over the genera g of the number of immersions of an unoriented circle with n crossing in an oriented surface of genus g.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =121a(4) =1538a(5) =28010a(6) =618243a(7) =16223774a(8) =490103223a(9) =16761330464a(10) =639968394245
External references
- oeis: A260847