This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A055110 #14 May 26 2024 12:42:18 %S A055110 41,62,65,66,69,77,94,95,105,111,113,114,137,138,141,145,154,158,165, %T A055110 178,183,205,210,213,217,226,238,258,265,273,282,295,299,301,310,313, %U A055110 322,330,337,345,357,371,382,385,395,418,438,442,445,457 %N A055110 Numbers k such that Q(sqrt(-k)) has class number 8. %H A055110 Jinyuan Wang, <a href="/A055110/b055110.txt">Table of n, a(n) for n = 1..131</a> %H A055110 <a href="/index/Qua#quadfield">Index entries for sequences related to quadratic fields</a> %t A055110 Select[Range[10000], MoebiusMu[#] != 0 && NumberFieldClassNumber[Sqrt[-#]] == 8 &] (* _Jinyuan Wang_, Mar 08 2020 *) %o A055110 (PARI) \\ See A005847. %Y A055110 See A003173, A005847, A006203, A046085, A046002, A055109, A046004, A055110, A046006, A055111 for class numbers 1 through 10. %K A055110 nonn,fini,full %O A055110 1,1 %A A055110 _N. J. A. Sloane_, Jun 16 2000