A230870 - OEIS

A230870

Class numbers h-tilde_n^{+} corresponding to the primes listed in A230869.

4, 11, 3, 3, 4, 7, 16, 4, 45, 5, 8, 27, 4, 7, 4, 11, 495, 16, 3, 3, 11, 8, 47, 4, 5, 49, 16, 16, 71, 5, 28, 13, 7, 5, 224, 19, 3, 211, 275, 3, 7, 4, 5, 247, 57, 7, 7, 17, 4, 42, 4, 7, 11, 25, 4, 49, 3, 4, 7, 7, 25, 27, 37, 4, 5, 16, 3, 4

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OFFSET

1,1

COMMENTS

Taken from the "Main Table" of Schoof.

There is a very slight chance that a(n) is only a proper divisor of the actual class number (see the Schoof and Miller articles for details).

LINKS

Table of n, a(n) for n=1..68.

John C. Miller, Class numbers of totally real fields and applications to the Weber class number problem, arXiv:1405.1094 [math.NT], 2014.

John C. Miller, Real cyclotomic fields of prime conductor and their class numbers, arXiv:1407.2373 [math.NT], 2014.

Rene Schoof, Class numbers of real cyclotomic fields of prime conductor, Math. Comp., 72 (2002), 913-937.

CROSSREFS

Cf. A230869.

Sequence in context: A087171 A282026 A066333 * A115642 A115643 A091387

Adjacent sequences: A230867 A230868 A230869 * A230871 A230872 A230873

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 06 2013

STATUS

approved