A034257 Maximal discrete supergroups of Gamma_0(n).

1, 3, 3, 7, 3, 9, 3, 11, 9, 9

Offset

1,2

References

J. H. Conway, Understanding groups like Gamma_0(N), in Groups, Difference Sets and the Monster, de Gruyter, (1996), 327-343.

Links

Table of n, a(n) for n=1..10.

Formula

a(prime) = 3. - Sean A. Irvine, Aug 15 2020

Crossrefs

Sequence in context: A193934 A030316 A208884 * A145501 A370296 A182139

Adjacent sequences: A034254 A034255 A034256 * A034258 A034259 A034260

Keyword

nonn,more

Author

N. J. A. Sloane.

Status

approved