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 A051995 #11 Sep 21 2021 15:47:07 %S A051995 9,1,3,1,1,1,19,7,23,25,5,9,1,31,1,7,7,1,3,1,13,41,43,3,15,15,9,3,7,1, %T A051995 49,17,1,53,11,11,19,59,3,1,13,4,1,23,5,15,7,11,27,5,5,1,3,1,7,1,19,3, %U A051995 101,7,3,3,11,25,127,43,7,27,13,29,3,31,3,1,25,59,179,9,7,47,13 %N A051995 Consider real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+4k, k odd; sequence gives values of r. %C A051995 Excludes discriminants appearing in A051990. %D A051995 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A4(3), column r. %Y A051995 Cf. A051990, A051991, A051992, A051993, A051994, A051996, A051997, A051998. %K A051995 nonn,fini,full %O A051995 1,1 %A A051995 _N. J. A. Sloane_, Jan 04 2000 %E A051995 Offset changed to 1 by _Georg Fischer_, Sep 21 2021