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 A050962 #7 May 24 2013 07:08:21 %S A050962 421,757,1021,1097,1117,1301,1553,1973,2069,2237,2273,2789,2861,3373, %T A050962 3461,3517,3917,4133,4397,5573,5717,6221,6317,7253,7517,8741,9173, %U A050962 9437,10181,11597,15797 %N A050962 Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 13. %D A050962 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A. %H A050962 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 A050962 Cf. A050950-A050969, A051962-A051965. %K A050962 nonn,fini,full %O A050962 1,1 %A A050962 _N. J. A. Sloane_, Jan 04 2000