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A054728 a(n) = smallest level N such that genus of modular curve X_0(N) is n (or -1 if no such curve exists). 2
1, 11, 22, 30, 38, 42, 58, 60, 74, 66, 86, 78, 106, 105, 118, 102, 134, 114, 223, 132, 166, 138, 188, 156, 202, 168, 214, 174, 236, 186, 359, 204, 262, 230, 278, 222, 298, 240, 314, 246, 326, 210, 346, 270, 358, 282, 557, 306, 394, 312, 412, 318 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

a(150) = -1, a(n) > 0 for 0<=n<=149.

REFERENCES

J. A. Csirik, The genus of X_0(N) is not 150, preprint, 2000.

CROSSREFS

Cf. A054727, A054728.

Sequence in context: A160272 A164006 A178736 * A178897 A013576 A065998

Adjacent sequences:  A054725 A054726 A054727 * A054729 A054730 A054731

KEYWORD

nonn

AUTHOR

Janos A. Csirik (janos(AT)research.att.com), Apr 21 2000

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.