A278582 Numbers n such that the Shimura subgroup Sigma(n) of the Jacobi variety J_0(n) has order 2.

20, 21, 24, 32, 48, 64, 72, 96, 100, 144, 147, 199, 288, 576

Offset: 1

Author

N. J. A. Sloane, Nov 30 2016

Keywords

• nonn
• fini
• full

References

• Ling, S., and J. Oesterlé. "The Shimura subgroup of J_0(N)." Astérisque, Vol. 196-197 (1991), 171-203.

Crossrefs

Cf. A278581.