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A102274 Primes p such that Q(sqrt(-21p)) has genus characters chi_{-3} = -1, chi_{-7} = -1. 1
47, 59, 83, 131, 167, 227, 251, 311, 383, 419, 467, 479, 503, 563, 587, 647, 719, 839, 887, 971, 983, 1091, 1151, 1223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Cohn, H. and Lagarias, J. C., On the existence of fields governing the 2-invariants of the classgroup of Q(sqrt{dp}) as p varies, Math. Comp. 41 (1983), 711-730.

LINKS

Table of n, a(n) for n=1..24.

CROSSREFS

Cf. A102269-A102275.

Sequence in context: A061758 A046503 A227982 * A139909 A243430 A126980

Adjacent sequences:  A102271 A102272 A102273 * A102275 A102276 A102277

KEYWORD

nonn

AUTHOR

N. J. A. Sloane Feb 19 2005

STATUS

approved

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Last modified December 11 05:05 EST 2016. Contains 279034 sequences.