

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
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OFFSET

0,1


REFERENCES

D. A. Buell, Binary Quadratic Forms. SpringerVerlag, NY, 1989, pp. 224241.
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), 491492.
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: A097149 A185007 A139035 * A184882 A073577 A139830
Adjacent sequences: A002143 A002144 A002145 * A002147 A002148 A002149


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Mira Bernstein


STATUS

approved



