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 A050956 #7 May 24 2013 06:27:26 %S A050956 89,109,113,137,373,389,509,653,797,853,997,1493,1997,2309,2621,3797, %T A050956 4973 %N A050956 Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 7. %D A050956 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A. %H A050956 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 A050956 Cf. A050950-A050969, A051962-A051965. %K A050956 nonn,fini,full %O A050956 1,1 %A A050956 _N. J. A. Sloane_, Jan 04 2000