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 A256686 #11 Feb 16 2025 08:33:25
%S A256686 8,6,9,5,7,6,4,1,6,3,8,1,6,4,0,1,2,6,6,4,8,8,7,7,6,1,6,0,8,0,4,6,4,5,
%T A256686 8,2,0,2,7,2,4,3,8,0,8,4,9,6,6,7,2,8,7,8,3,2,6,6,5,7,8,8,6,7,4,7,7,7,
%U A256686 3,8,7,1,4,2,7,7,1,8,5,9,6,1,5,8,5,7,0,0,9,5,9,3,1,8,6,5,8,6,8,8,9,6,3,5
%N A256686 Decimal expansion of the [negated] abscissa of the Gamma function local maximum in the interval [-9,-8].
%H A256686 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/GammaFunction.html">Gamma Function</a>
%H A256686 Wikipedia, <a href="http://en.wikipedia.org/wiki/Particular_values_of_the_Gamma_function">Particular values of the Gamma Function</a>
%F A256686 Solution to PolyGamma(x) = 0 in the interval [-9,-8].
%e A256686 Gamma(-8.695764163816401266488776160804645820272438084966728783...)
%e A256686 = -0.00002092529044652666875369728468060738117860083247673665...
%t A256686 digits = 104; x0 = x /. FindRoot[PolyGamma[0, x] == 0, {x, -17/2}, WorkingPrecision -> digits + 5]; RealDigits[x0, 10, digits] // First
%Y A256686 Cf. A030169, A030171, A175472, A175473, A256681-A256685, A256687.
%K A256686 nonn,cons
%O A256686 1,1
%A A256686 _Jean-François Alcover_, Apr 08 2015