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A248176 Decimal expansion of psi(-1/2). 2
3, 6, 4, 8, 9, 9, 7, 3, 9, 7, 8, 5, 7, 6, 5, 2, 0, 5, 5, 9, 0, 2, 3, 6, 6, 7, 0, 0, 1, 2, 4, 4, 4, 3, 2, 8, 0, 6, 8, 4, 0, 3, 9, 5, 3, 3, 9, 5, 6, 5, 8, 9, 2, 9, 5, 2, 8, 7, 2, 7, 4, 6, 1, 2, 8, 3, 4, 5, 0, 2, 9, 2, 8, 2, 9, 4, 5, 8, 9, 7, 8, 5, 1, 3, 2, 6, 2, 8, 2, 7, 1, 5, 4, 1, 5, 8, 7, 5, 4, 0, 1, 3, 6, 5, 5, 9, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

-1,1

COMMENTS

Psi denotes the digamma function.

LINKS

Stanislav Sykora, Table of n, a(n) for n = -1..2000

Wikipedia, Digamma function

FORMULA

Since psi(1 + x) = psi(x) + 1/x, equals 2 + psi(1/2) = 2 - 2*log(2)-EulerGamma = 2 - A020759.

EXAMPLE

0.0364899739785765205590236670012444328068403953395658929528727461...

MATHEMATICA

RealDigits[2 - (EulerGamma + 2Log[2]), 10, 100][[1]] (* Alonso del Arte, Oct 03 2014 *)

PROG

(PARI) psi(-1/2)

CROSSREFS

Cf. A001620, A002162, A020759.

Sequence in context: A004546 A197255 A154890 * A100000 A083682 A021278

Adjacent sequences:  A248173 A248174 A248175 * A248177 A248178 A248179

KEYWORD

nonn,cons,easy

AUTHOR

Stanislav Sykora, Oct 03 2014

STATUS

approved

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Last modified May 27 16:49 EDT 2017. Contains 287207 sequences.