Maximal discrete supergroups of Gamma_0(n).

A034257

Maximal discrete supergroups of Gamma_0(n).

Terms

    a(0) =1a(1) =3a(2) =3a(3) =7a(4) =3a(5) =9a(6) =3a(7) =11a(8) =9a(9) =9

External references