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 A051982 #7 Sep 21 2021 06:09:35 %S A051982 1018,1994,2965,4285,5354,5498,5585,8917,9242,9665,10265,12085,13061, %T A051982 13957,14677,15242,15613,16109,16565,16613,17173,17285,17429,17861, %U A051982 18037,18737,18965,34047,34957,35285,36413,37949,40085,40501,41165,47813,48149,50357,53285,57797,58853,61133,62957,63653,86957,146453 %N A051982 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 17. %C A051982 The article in 1992 had a(28)=34037. _Georg Fischer_, Sep 21 2021 %D A051982 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3. %H A051982 R. A. Mollin and H. C. Williams, <a href="https://www.ams.org/journals/mcom/1992-59-200/S0025-5718-1992-1136224-1/S0025-5718-1992-1136224-1.pdf">On real quadratic fields of class number two</a>, Mathematics of Computation, Vol. 59, No. 200, Oct. 1992, pp. 625-632. %Y A051982 Cf. A051966-A051989. %K A051982 nonn,fini,full %O A051982 1,1 %A A051982 _N. J. A. Sloane_, Jan 04 2000 %E A051982 a(36) and following from _Georg Fischer_, Sep 21 2021