A306300 Discriminant D of real quadratic number field Q(sqrt(D)) associated with fundamental discriminant d = A003658(n).

1, 5, 2, 3, 13, 17, 21, 6, 7, 29, 33, 37, 10, 41, 11, 53, 14, 57, 15, 61, 65, 69, 73, 19, 77, 85, 22, 89, 23, 93, 97, 101, 26, 105, 109, 113, 30, 31, 129, 133, 34, 137, 35, 141, 145, 149, 38, 39, 157, 161, 165, 42, 43, 173, 177, 181, 46, 185, 47, 193, 197

Offset: 1

Author

N. J. A. Sloane, Apr 02 2019

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000
• Britta Habdank-Eichelsbacher, Unimodulare Gitter über Reell-Quadratischen Zahlkörpern, Ergänzungsreihe 95-005, Univ. Bielefeld, 1995. See Section 4.2.

Crossrefs

Cf. A003658, A007913, A008833.

Formula

a(n) = A007913(A003658(n)) = A003658(n) / (A008833(A003658(n))).