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 A051973 #7 Sep 21 2021 06:17:22 %S A051973 91,238,282,638,695,707,710,854,866,942,1247,1403,1643,1655,1869,1883, %T A051973 1943,2238,2390,2483,2685,2978,3205,3333,3765,4247,4565,5069,5141, %U A051973 5829,6341,6365,6693,6773,6837,6965,7405,7469,8165,8853,9141 %N A051973 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 8. %D A051973 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3. %H A051973 Georg Fischer, <a href="/A051973/b051973.txt">Table of n, a(n) for n = 1..59</a> %Y A051973 Cf. A051966-A051989. %K A051973 nonn,fini,full %O A051973 1,1 %A A051973 _N. J. A. Sloane_, Jan 04 2000