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 A051979 #7 Sep 21 2021 06:03:19 %S A051979 190,319,406,430,471,474,611,667,670,669,742,745,806,807,1001,1043, %T A051979 1070,1115,1119,1309,1315,1338,1347,1398,1542,1545,1562,1634,1670, %U A051979 1691,1826,1839,1874,2282,2294,2315,2323,2337,2345,2427,2435,2463 %N A051979 Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 14. %D A051979 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A3. %H A051979 Georg Fischer, <a href="/A051979/b051979.txt">Table of n, a(n) for n = 1..168</a> %Y A051979 Cf. A051966-A051989. %K A051979 nonn,fini,full %O A051979 1,1 %A A051979 _N. J. A. Sloane_, Jan 04 2000