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A268979 Decimal expansion of the first negative root of the equation Gamma(x) + Psi(x) = 0, negated. 3
1, 7, 8, 1, 5, 8, 0, 6, 9, 0, 1, 0, 1, 4, 6, 1, 6, 2, 3, 5, 7, 8, 5, 8, 3, 6, 6, 1, 8, 0, 0, 2, 9, 8, 2, 7, 7, 8, 7, 9, 8, 0, 9, 9, 5, 4, 4, 6, 6, 6, 7, 4, 0, 1, 7, 9, 0, 3, 0, 4, 2, 3, 9, 1, 4, 1, 0, 6, 0, 0, 2, 9, 4, 3, 9, 6, 4, 9, 7, 2, 9, 6, 8, 7, 4, 7, 6, 4, 6, 9, 9, 8, 9, 9, 8, 6, 7, 3, 7, 6, 7, 1, 2, 4, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Gamma(x) stands for the gamma function (Euler's integral of the second kind), Psi(x) denotes the digamma function (logarithmic derivative of the gamma function).
LINKS
EXAMPLE
-1.7815806901014616235785836618002982778798099544666740...
MAPLE
Digits:= 150: fsolve(GAMMA(x)+Psi(x)=0, x=-1.8);
MATHEMATICA
FindRoot[Gamma[x]+PolyGamma[x]==0, {x, -1.8}, WorkingPrecision->120][[1, 2]] // RealDigits[#, 10, 105]& // First
PROG
(PARI) default(realprecision, 120); solve(x = -1.80, -1.76, gamma(x)+psi(x))
CROSSREFS
Sequence in context: A021132 A019936 A086724 * A329219 A093720 A154216
KEYWORD
nonn,cons
AUTHOR
STATUS
approved

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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)