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 A050969 #7 May 24 2013 07:09:32 %S A050969 151,199,367,622,863,1151,1454,1501,1502,1941,2033,3902,4101,4317, %T A050969 4677,4821,5549,6077,7277,8133,8453,8813,9253,9357,11381,11733,14237, %U A050969 15837,17933,18293,21653,23453,25157,36077,49013 %N A050969 Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 20. %D A050969 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A. %H A050969 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 A050969 Cf. A050950-A050969, A051962-A051965. %K A050969 nonn,fini,full %O A050969 1,1 %A A050969 _N. J. A. Sloane_, Jan 04 2000