Number of subgroups of index n in fundamental group of a certain fiber space.
A027838
Number of subgroups of index n in fundamental group of a certain fiber space.
Terms
- a(0) =1a(1) =7a(2) =22a(3) =111a(4) =486a(5) =3772a(6) =29142a(7) =275871a(8) =2830459a(9) =32028882a(10) =392744078a(11) =5201524044a(12) =73943424582
External references
- oeis: A027838