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A001766 Index of (the image of) the modular group Gamma(n) in PSL_2(Z).
(Formerly M4098 N1700)
+0
3
1, 6, 12, 24, 60, 72, 168, 192, 324, 360, 660, 576, 1092, 1008, 1440, 1536, 2448, 1944, 3420, 2880, 4032, 3960, 6072, 4608, 7500, 6552, 8748, 8064, 12180, 8640, 14880, 12288, 15840, 14688, 20160, 15552, 25308, 20520, 26208, 23040, 34440 (list; graph; listen)
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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