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A002146 Smallest prime == 7 mod 8 where Q(sqrt -p) has class number 2n+1.
(Formerly M4377 N1841)
4
7, 23, 47, 71, 199, 167, 191, 239, 383, 311, 431, 647, 479, 983, 887, 719, 839, 1031, 1487, 1439, 1151, 1847, 1319, 3023, 1511, 1559, 2711, 4463, 2591, 2399, 3863, 2351, 3527, 3719 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

D. A. Buell, Binary Quadratic Forms. Springer-Verlag, NY, 1989, pp. 224-241.

D. Shanks, Review of R. B. Lakein and S. Kuroda, Tables of class numbers h(-p) for fields Q(sqrt(-p)), p <= 465071, Math. Comp., 24 (1970), 491-492.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

David Broadhurst and T. D. Noe, Table of n, a(n) for n=0..28603

CROSSREFS

Cf. A002147, A002143 (class numbers)

Sequence in context: A185007 A308732 A139035 * A184882 A073577 A139830

Adjacent sequences:  A002143 A002144 A002145 * A002147 A002148 A002149

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mira Bernstein

STATUS

approved

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Last modified October 23 17:32 EDT 2019. Contains 328373 sequences. (Running on oeis4.)