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 A221713 #16 Sep 09 2024 15:02:49 %S A221713 3,1,0,9,7,6,6,7,9,9,2,5,9,8,7,1,7,0,0,0,4,3,5,6,2,8,7,4,2,9,6,2,8,4, %T A221713 1,4,5,2,9,1,2,1,9,0,2,6,0,0,0,4,0,0,8,2,8,2,4,5,5,5,5,4,8,5,2,8,2,3, %U A221713 9,1,0,7,0,4,9,6,8,6,2,7,2,8,0,5,5,8,4 %N A221713 Hardy-Littlewood constant for x^2+x+75. %D A221713 See A221712. %H A221713 Henri Cohen, <a href="http://www.math.u-bordeaux.fr/~cohen/hardylw.dvi">High-precision computation of Hardy-Littlewood constants</a>, (1998). %H A221713 Henri Cohen, <a href="/A221712/a221712.pdf">High precision computation of Hardy-Littlewood constants</a>. [Cached pdf version, with permission] %e A221713 0.3109766799259871700043562874296284... %o A221713 (PARI) \\ See A221712. %Y A221713 Cf. A221712. %K A221713 nonn,cons %O A221713 0,1 %A A221713 _N. J. A. Sloane_, Jan 26 2013 %E A221713 More terms from _Hugo Pfoertner_, Jan 31 2020