A368057 Number of degree 4 number fields unramified outside the first n prime numbers.

7, 62, 379, 2165, 12315, 67887

Offset: 1

Author

Robin Visser, Dec 09 2023

Keywords

• nonn
• more

Examples

			For n = 1, the a(1) = 7 degree 4 number fields unramified away from {2} can be given by Q(a) where a is a root of x^4 + 1, x^4 - 2x^2 + 2, x^4 - 2x^2 - 1, x^4 - 2, x^4 + 2, x^4 - 4x^2 + 2, or x^4 + 4x^2 + 2.
		

Links

• J. W. Jones and D. P. Roberts, A database of number fields, LMS J. Comput. Math. 17 (2014), no. 1, 595-618.

Crossrefs

Cf. A126646 (degree 2), A367669 (degree 3).