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A230870 Class numbers h-tilde_n^{+} corresponding to the primes listed in A230869. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 25 16:03 EDT 2021. Contains 346291 sequences. (Running on oeis4.)