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 A102819 #9 Jul 11 2019 01:51:39 %S A102819 9,9,9,9,3,3,6,7,3,1,3,3,2,0,1,6,7,4,0,2,2,4,9,5,5,3,6,8,8,2,7,8,6,4, %T A102819 9,5,2,6,6,5,5,8,2,5,4,4,2,5,8,8,7,9,2,1,2,8,5,7,6,8,6,6,8,0,4,7,5,1, %U A102819 5,1,4,6,2,0,4,1,0,5,2,4,8,6,5,4,6,0,1,9,7,5,2,7,1,6,7,5,0,2,8,4,7,0,3,1,7 %N A102819 Decimal expansion of (Gamma(delta)/delta)^2 where delta is the Feigenbaum bifurcation velocity constant (A006890). %C A102819 Let c be this constant, then c - 30*gamma^2 = .0039990171004565... %H A102819 D. Broadhurst, <a href="http://www.plouffe.fr/simon/constants/feigenbaum.txt">Feigenbaum constants to 1018 decimal places</a> %e A102819 9.999336731332016740224955368827864952665582544... %t A102819 Set delta then RealDigits[(Gamma[delta]/delta)^2, 10, 110][[1]] %Y A102819 Cf. A006890. %K A102819 cons,nonn %O A102819 1,1 %A A102819 _Gerald McGarvey_, Feb 26 2005