1,1

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).

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.

Cf. A230869.

Sequence in context: A087171 A282026 A066333 * A115642 A115643 A091387

Adjacent sequences: A230867 A230868 A230869 * A230871 A230872 A230873

nonn

N. J. A. Sloane, Nov 06 2013

approved