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 A050958 #7 May 24 2013 06:27:34 %S A050958 73,97,233,277,349,353,613,821,877,1181,1277,1613,1637,1693,2357,3557, %T A050958 3989,4157,4517,7213,11213 %N A050958 Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 9. %D A050958 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A. %H A050958 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 A050958 Cf. A050950-A050969, A051962-A051965. %K A050958 nonn,fini,full %O A050958 1,1 %A A050958 _N. J. A. Sloane_, Jan 04 2000