A258695 Maximal index of a congruence subgroup of PSL(2,Z) of genus n.

72, 108, 108, 168, 180, 192, 192, 216, 220, 288, 324, 288, 330, 384, 300, 384, 364, 480, 384, 504, 408, 480, 486, 504, 546

Offset

0,1

Links

Table of n, a(n) for n=0..24.

C. J. Cummins and S. Pauli, Congruence Subgroups of PSL(2,Z) of Genus Less than or Equal to 24, Experiment. Math. Volume 12, Issue 2 (2003), 243-255. See Table 1.

Crossrefs

A258691, A102474, A258693-A258700 give the ten sequences in Table 1 of Cummins and Pauli (2003).

Sequence in context: A118218 A242186 A205189 * A102562 A357460 A216426

Adjacent sequences: A258692 A258693 A258694 * A258696 A258697 A258698

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 07 2015

Status

approved