A257603 Maximal squarefree f such that the congruence subgroup Gamma_0(f)+ has genus n.

119, 238, 390, 510, 570, 910, 858, 897, 1190, 1365, 1326, 1518, 2310, 1870, 2730, 2002, 2145, 2046, 2415, 3570, 3003, 2926, 3135, 3990, 3255, 2670, 4290, 3315, 4830, 3198, 5610, 3927, 3910, 6006, 4641, 6270, 4270, 5005, 6630, 6510, 5313, 5187, 6045, 7590, 4758, 7854, 5565, 7770, 6783

Offset

0,1

Links

N. J. A. Sloane, Table of n, a(n) for n = 0..100 [Extracted from the Cummins paper]

C. J. Cummins, Congruence subgroups of groups commensurable with PSL(2, Z) of genus 0 and 1, Experiment. Math. Volume 13, Issue 3 (2004).

C. J. Cummins, Tables accompanying previous paper

Crossrefs

Sequence in context: A255580 A227515 A207059 * A063348 A243581 A103852

Adjacent sequences: A257600 A257601 A257602 * A257604 A257605 A257606

Keyword

nonn

Author

N. J. A. Sloane, Jun 07 2015

Status

approved