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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified March 4 13:38 EST 2024. Contains 370532 sequences. (Running on oeis4.)