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A102474
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a(n)=Number of conjugacy classes of congruence subgroups of genus n of PSL(2,Z).
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0
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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LINKS
| C. 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.
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CROSSREFS
| Sequence in context: A108601 A039603 A030026 * A015235 A204649 A195674
Adjacent sequences: A102471 A102472 A102473 * A102475 A102476 A102477
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KEYWORD
| more,nonn
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AUTHOR
| Kok Seng Chua (chuaks(AT)ihpc.a-star.edu.sg), Feb 23 2005
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