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 A051994 #8 Sep 21 2021 15:46:59 %S A051994 6,7,8,3,10,11,11,4,12,14,3,5,16,17,6,6,4,20,4,7,7,3,22,23,8,5,25,25, %T A051994 5,26,4,28,4,29,6,30,32,11,7,36,12,13,3,8,14,44,3,9,16,7,7,17,17,4,18, %U A051994 5,19,4,61,62,3,2,5,26,27,17,20,6,16,39,28,146,30,23,61,22 %N A051994 Consider real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+2k, k odd; sequence gives values of r. %C A051994 Excludes discriminants appearing in A051990. %D A051994 R. A. Mollin, Quadratics, CRC Press, 1996, Appendix A, Table A4(2), column r. %Y A051994 Cf. A051990, A051991, A051992, A051993, A051995, A051996, A051997, A051998. %K A051994 nonn,fini,full %O A051994 1,1 %A A051994 _N. J. A. Sloane_, Jan 04 2000 %E A051994 Offset changed to 1 by _Georg Fischer_, Sep 21 2021