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 A051968 #6 Mar 30 2012 16:48:43 %S A051968 65,185,458,485,1157,2117,2285,3077,3293,3365,12365 %N A051968 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 3. %D A051968 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3. %H A051968 R. A. Mollin, H. C. Williams, <a href="http://dx.doi.org/10.1090/S0025-5718-1992-1136224-1">On real quadratic fields of class number two</a>, Math. Comp. 59 (1992) 625-632. %Y A051968 Cf. A051966-A051989. %K A051968 nonn,fini,full %O A051968 1,1 %A A051968 _N. J. A. Sloane_, Jan 04 2000