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A218042 Numbers n such that Q(sqrt(n)) has class number 10. 11
1111, 1226, 2031, 2335, 2362, 2602, 2986, 3129, 3246, 3379, 3585, 3598, 3599, 3722, 3782, 3966, 4097, 4321, 4334, 4359, 4555, 4582, 4586, 4843, 4865, 4867, 5071, 5611, 5615, 5630, 5631, 5777, 6071, 6078, 6085, 6087, 6202, 6239, 6294, 6395, 6574, 6854, 6891 (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

Eric Weisstein's World of Mathematics, Class Number

MATHEMATICA

Select[Range[6891], SquareFreeQ[#] && NumberFieldClassNumber@Sqrt[#] == 10 &]

PROG

(PARI) is(n)=issquarefree(n) && qfbclassno(if(n%4>1, 4, 1)*n)==10 \\ Charles R Greathouse IV, Jan 19 2017

CROSSREFS

Cf. A003172, A029702-A029705, A218038-A218041.

Sequence in context: A278980 A290848 A290556 * A176670 A072434 A033285

Adjacent sequences:  A218039 A218040 A218041 * A218043 A218044 A218045

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Oct 19 2012

STATUS

approved

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Last modified October 15 04:33 EDT 2019. Contains 328026 sequences. (Running on oeis4.)