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A258698 Number of torsion-free congruence subgroups of PSL(2,Z) of genus n, up to conjugacy in PGL(2,Z). 0
33, 48, 49, 105, 86, 125, 45, 191, 76, 203, 120, 179, 70, 303, 53, 263, 123, 317, 60, 375, 85, 450, 132, 271, 51 (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 , Experimental Math., 12 (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: A247527 A111458 A179244 * A258697 A204373 A111502
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 07 2015
STATUS
approved

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Last modified March 5 02:44 EST 2024. Contains 370537 sequences. (Running on oeis4.)