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%I #18 Jun 02 2022 05:44:31
%S 8,9,0,7,2,9,4,1,2,6,7,2,2,6,1,2,4,0,6,4,2,7,2,6,8,0,1,9,1,9,3,1,0,5,
%T 2,5,7,3,8,2,9,6,0,6,9,2,5,5,4,4,7,4,2,1,2,9,4,3,4,1,3,5,1,2,4,5,7,1,
%U 1,6,3,8,8,5,5,4,3,6,7,2,6,9,3,2,9,0,9
%N Decimal expansion of the negated value of the digamma function at 5/6.
%H Vincenzo Librandi, <a href="/A222458/b222458.txt">Table of n, a(n) for n = 0..5000</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GausssDigammaTheorem.html">Gauss's Digamma Theorem</a>.
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Digamma_function#Gauss.27s_digamma_theorem">Digamma function: Gauss's digamma theorem</a>.
%H <a href="/index/Di#differential_equations">Index entries for sequences related to the digamma function</a>
%F Psi(5/6) = -gamma + Pi*sqrt(3)/2 - 3*log(3)/2 - 2*log(2).
%e Psi(5/6) = -0.890729412672261240642726801919310525738296...
%t RealDigits[-PolyGamma[5/6], 10, 90][[1]]
%o (PARI) -psi(5/6)
%o (Maxima) fpprec:90; ev(bfloat(-psi[0](5/6)));
%Y Cf. A020759, A047787, A200064, A222457.
%K nonn,cons
%O 0,1
%A _Bruno Berselli_, Feb 21 2013
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