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 A050966 #7 May 24 2013 07:08:48 %S A050966 521,617,709,1433,1597,2549,2909,3581,3821,4013,5501,5693,5813,6197, %T A050966 7853,8093,8573,9677,10597,10973,13109,13613,15413,17093,20261,22637, %U A050966 26717 %N A050966 Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 17. %D A050966 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A. %H A050966 R. A. Mollin and H. C. Williams, <a href="http://projecteuclid.org/euclid.pja/1195512263">On a determination of real quadratic fields of class number one and related continued fraction period length less than 25</a>, Proc. Japan Acad. Ser. A Math. Sci. Volume 67, Number 1 (1991), 20-25. (cf. Table 3.1) %Y A050966 Cf. A050950-A050969, A051962-A051965. %K A050966 nonn,fini,full %O A050966 1,1 %A A050966 _N. J. A. Sloane_, Jan 04 2000