A051991 Discriminants of real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+2k, k odd.

34, 51, 66, 87, 102, 119, 123, 138, 146, 194, 215, 231, 258, 287, 318, 330, 390, 402, 410, 435, 447, 455, 482, 527, 570, 615, 623, 627, 635, 678, 770, 782, 798, 843, 890, 902, 1022, 1095, 1235, 1298, 1302, 1515, 1547, 1610, 1770, 1938, 1995

Offset

1,1

Comments

Excludes discriminants appearing in A051990.

References

R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A4(2), column D.

Links

Georg Fischer, Table of n, a(n) for n = 1..76

Crossrefs

Cf. A051990, A051992, A051993, A051994, A051995, A051996, A051997, A051998.

Sequence in context: A260475 A107355 A260468 * A214473 A332530 A092888

Adjacent sequences: A051988 A051989 A051990 * A051992 A051993 A051994

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Jan 04 2000

Status

approved