A276541 Positive integers n such that the ring of integers of Q(sqrt(n)) is not a UFD.

10, 15, 26, 30, 34, 35, 39, 40, 42, 51, 55, 58, 60, 65, 66, 70, 74, 78, 79, 82, 85, 87, 90, 91, 95, 102, 104, 105, 106, 110, 111, 114, 115, 119, 120, 122, 123, 130, 135, 136, 138, 140, 142, 143, 145, 146, 154, 155, 156, 159, 160, 165, 168, 170, 174, 178, 182

Offset: 1

Author

Robert G. Wilson v, Apr 09 2017

Keywords

• nonn

Comments

Complement of A219361.

Crossrefs

Cf. A219361.

Programs

Mathematica

Select[Range[210], NumberFieldClassNumber@Sqrt@# > 1 &]