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A225060 Discriminants D < 0 such that h(D) > h(D') for D < D' < 0, negated. 3
3, 15, 23, 39, 47, 71, 95, 119, 167, 191, 215, 239, 311, 431, 479, 551, 671, 719, 791, 839, 959, 1151, 1319, 1511, 1559, 1679, 1991, 2159, 2351, 2519, 2831, 2999, 3071, 3671, 3839, 3911, 4031, 4079, 4199, 4679, 4991, 5351, 5519, 5591, 5711, 6431, 6551, 7391, 8111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Essentially records in A014600.

REFERENCES

H. Heilbronn, On the class number in imaginary quadratic fields, Quart. J. Math. Oxford 5 (1934), pp. 293-301.

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..675

PROG

(PARI) r=0; forstep(n=3, 1e6, [1, 3], t=qfbclassno(-n); if(t>r, r=t; print1(n", ")))

CROSSREFS

Cf. A014600, A225061, A038552.

Sequence in context: A072200 A106403 A225365 * A060649 A344073 A009210

Adjacent sequences:  A225057 A225058 A225059 * A225061 A225062 A225063

KEYWORD

nonn

AUTHOR

Charles R Greathouse IV, Apr 26 2013

STATUS

approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)