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 A192322 #26 Jul 20 2018 17:35:42
%S A192322 84,120,132,168,195,228,280,312,340,372,408,435,483,520,532,555,595,
%T A192322 627,708,715,760,795,1012,1435
%N A192322 Negated discriminants of imaginary quadratic number fields whose class group is isomorphic to the Klein 4-group, C2 x C2.
%C A192322 Added keyword "full" - This sequence is a subsequence of A013658, whose last term is 1555. I have verified that the terms above are complete and correct. - _Rick L. Shepherd_, May 06 2013
%H A192322 Alexandre Gélin, Everett W. Howe, and Christophe Ritzenthaler, <a href="https://arxiv.org/abs/1806.03826">Principally Polarized Squares of Elliptic Curves with Field of Moduli Equal To Q</a>, arXiv:1806.03826 [math.NT], 2018 (see table 1 page 4).
%H A192322 Rick L. Shepherd, <a href="http://libres.uncg.edu/ir/uncg/f/Shepherd_uncg_0154M_11099.pdf">Binary quadratic forms and genus theory</a>, Master of Arts Thesis, University of North Carolina at Greensboro, 2013.
%o A192322 (PARI) ok(n)={isfundamental(-n) && [2, 2] == quadclassunit(-n).cyc} \\ _Andrew Howroyd_, Jul 20 2018
%Y A192322 Subsequence of A013658.
%K A192322 nonn,fini,full
%O A192322 1,1
%A A192322 _David Terr_, Jun 28 2011