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 A175473 #17 Feb 16 2025 08:33:12
%S A175473 1,5,7,3,4,9,8,4,7,3,1,6,2,3,9,0,4,5,8,7,7,8,2,8,6,0,4,3,6,9,0,4,3,4,
%T A175473 6,1,2,6,5,5,0,4,0,8,5,9,1,1,6,8,4,6,1,4,9,9,3,0,1,4,2,5,6,8,7,9,7,0,
%U A175473 2,0,3,4,4,3,9,6,5,1,4,0,4,8,1,0,4,7,3,2,3,9,8,2,5,1,8,8,5,6,2,8,1,8,7,7,0
%N A175473 Decimal expansion of the absolute value of the abscissa of the local minimum of the Gamma function in the interval [ -2,-1].
%C A175473 Also the location of the zero of the digamma function in the same interval.
%D A175473 Jerome Spanier and Keith B. Oldham, "Atlas of Functions", Hemisphere Publishing Corp., 1987, chapter 44, page 427.
%H A175473 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GammaFunction.html">Gamma Function</a>.
%H A175473 Wikipedia, <a href="http://en.wikipedia.org/wiki/Particular_values_of_the_Gamma_function">Particular values of the Gamma function</a>.
%e A175473 Gamma(-1.5734984731623904587782860437..) = 2.3024072583396801358235820396..
%t A175473 x /. FindRoot[ PolyGamma[0, x] == 0, {x, -3/2}, WorkingPrecision -> 110] // Abs // RealDigits // First // Take[#, 105]& (* _Jean-François Alcover_, Jan 21 2013 *)
%o A175473 (PARI) solve(x=1.5,1.6,psi(-x)) \\ _Charles R Greathouse IV_, Jul 19 2013
%Y A175473 Cf. A030169, A030171, A175472, A175474.
%K A175473 cons,nonn
%O A175473 1,2
%A A175473 _R. J. Mathar_, May 25 2010