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A258693
Number of congruence subgroups of PSL(2,Z) of genus n, up to conjugacy in PGL(2,Z).
10
121, 163, 145, 241, 215, 256, 175, 388, 212, 403, 235, 381, 198, 549, 178, 485, 294, 667, 191, 647, 203, 729, 284, 537, 212
OFFSET
0,1
LINKS
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: A242372 A182072 A262514 * A037266 A352221 A240775
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 07 2015
STATUS
approved