A079029 Least k such that the class number of quadratic order of discriminant D=-4k equals p, where p runs through the primes.

5, 11, 47, 71, 167, 191, 383, 311, 647, 887, 719, 1487, 1151, 1847, 3023, 2711, 2399, 3863, 3719, 5471, 2999, 4391, 3911, 6311, 5519, 5879, 13799, 8231, 5711, 8039, 19463, 12671, 15287, 9239, 17783, 22727, 25847, 40039, 15671, 14159, 17519, 14759, 22271, 26591

Offset

1,1

Links

Table of n, a(n) for n=1..44.

Prog

(PARI) a(n) = {my(k=1, p=prime(n)); while(abs(p-qfbclassno(-4*k))>0, k++); k; }

Crossrefs

Cf. A000003.

Sequence in context: A222476 A097056 A092358 * A106953 A297445 A149503

Adjacent sequences: A079026 A079027 A079028 * A079030 A079031 A079032

Keyword

nonn

Author

Benoit Cloitre, Feb 01 2003

Extensions

More terms from Jinyuan Wang, Apr 03 2020

Status

approved