A055109 - OEIS

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A055109

Numbers k such that Q(sqrt(-k)) has class number 6.

26, 29, 38, 53, 61, 87, 106, 109, 118, 157, 202, 214, 247, 262, 277, 298, 339, 358, 397, 411, 451, 515, 707, 771, 835, 843, 1059, 1099, 1147, 1203, 1219, 1267, 1315, 1347, 1363, 1563, 1603, 1843, 1915, 1963, 2227, 2283, 2443, 2515, 2563, 2787

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Jinyuan Wang, Table of n, a(n) for n = 1..51

Index entries for sequences related to quadratic fields

MATHEMATICA

Select[Range[10000], MoebiusMu[#] != 0 && NumberFieldClassNumber[Sqrt[-#]] == 6 &] (* Jinyuan Wang, Mar 08 2020 *)

PROG

(PARI) \\ See A005847.

CROSSREFS

See A003173, A005847, A006203, A046085, A046002, A055109, A046004, A055110, A046006, A055111 for class numbers 1 through 10.

Sequence in context: A056081 A081644 A256619 * A106552 A106550 A304949

Adjacent sequences: A055106 A055107 A055108 * A055110 A055111 A055112

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Jun 16 2000

STATUS

approved