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 A029705 Squarefree n such that Q(sqrt(n)) has class number 5. 11
 401, 439, 499, 727, 817, 982, 1093, 1126, 1327, 1393, 1429, 1486, 1641, 1766, 1897, 2027, 2081, 2153, 2399, 2878, 3121, 3134, 3181, 3238, 3251, 3253, 3814, 3967, 3997, 4271, 4353, 4357, 4358, 4441, 4591, 4622, 4757, 4889, 5107, 5241, 5269, 5527, 5711, 5774 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 Index entries for sequences related to quadratic fields MATHEMATICA Select[Range[5774], SquareFreeQ[#] && NumberFieldClassNumber@Sqrt[#] == 5 &] (* Arkadiusz Wesolowski, Oct 22 2012 *) PROG (PARI) is(n)=issquarefree(n)&&bnfinit('x^2-n).cyc==[5] \\ Charles R Greathouse IV, Oct 18 2012 CROSSREFS Cf. A003172, A029702-A029704, A218038-A218042. Sequence in context: A013895 A296904 A159890 * A096991 A332674 A141026 Adjacent sequences: A029702 A029703 A029704 * A029706 A029707 A029708 KEYWORD nonn AUTHOR Paolo Dominici (pl.dm(AT)libero.it) STATUS approved

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Last modified February 26 11:46 EST 2024. Contains 370352 sequences. (Running on oeis4.)