A317970 Positive n such that the ring of algebraic integers O_n in a quadratic number field has class number 1 but is not Euclidean with respect to the norm.

53, 56, 61, 69, 77, 88, 89, 92, 93

Offset

1,1

Comments

The usual symbol in number theory is O_d, not O_n.

Links

Table of n, a(n) for n=1..9.

Erich Kaltofen and Heinrich Rolletschek, Computing greatest common divisors and factorizations in quadratic number fields, Mathematics of Computation 53.188 (1989): 697-720. See page 698.

Crossrefs

Cf. A014602.

Sequence in context: A344797 A344798 A294739 * A174355 A095549 A095539

Adjacent sequences: A317967 A317968 A317969 * A317971 A317972 A317973

Keyword

nonn,more

Author

N. J. A. Sloane, Aug 29 2018

Status

approved