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 A055111 #15 May 26 2024 13:17:40 %S A055111 74,86,119,122,143,159,166,181,197,218,229,303,317,319,346,373,394, %T A055111 415,421,422,538,541,611,613,635,694,699,709,757,779,803,851,853,877, %U A055111 923,982,1093,1115,1213,1318,1643,1707,1779,1819,1835,1891,1923 %N A055111 Numbers k such that Q(sqrt(-k)) has class number 10. %H A055111 Jinyuan Wang, <a href="/A055111/b055111.txt">Table of n, a(n) for n = 1..87</a> %H A055111 <a href="/index/Qua#quadfield">Index entries for sequences related to quadratic fields</a> %t A055111 Select[Range[10000], MoebiusMu[#] != 0 && NumberFieldClassNumber[Sqrt[-#]] == 10 &] (* _Jinyuan Wang_, Mar 08 2020 *) %o A055111 (PARI) \\ See A005847. %Y A055111 See A003173, A005847, A006203, A046085, A046002, A055109, A046004, A055110, A046006, A055111 for class numbers 1 through 10. %K A055111 nonn,fini,full %O A055111 1,1 %A A055111 _N. J. A. Sloane_, Jun 16 2000