A102474 - OEIS

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A102474

Number of congruence subgroups of PSL(2,Z) of genus n, up to conjugacy in PSL(2,Z).

10

132, 187, 177, 284, 261, 303, 230, 480, 277, 469, 304, 489, 269, 664, 268, 596, 410, 819, 273, 812, 308, 888, 365, 686, 336

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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)

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. [Note two different references with similar titles]

CROSSREFS

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

Sequence in context: A039603 A354812 A030026 * A015235 A204649 A224548

Adjacent sequences: A102471 A102472 A102473 * A102475 A102476 A102477

KEYWORD

nonn,more

AUTHOR

Kok Seng Chua (chuaks(AT)ihpc.a-star.edu.sg), Feb 23 2005

STATUS

approved