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A201994 Decimal expansion of zeta''(2), the second derivative of the Riemann zeta function at 2. 13
1, 9, 8, 9, 2, 8, 0, 2, 3, 4, 2, 9, 8, 9, 0, 1, 0, 2, 3, 4, 2, 0, 8, 5, 8, 6, 8, 7, 4, 2, 1, 5, 1, 6, 3, 8, 1, 4, 9, 4, 4, 6, 0, 7, 7, 0, 7, 4, 2, 5, 0, 2, 7, 0, 9, 0, 7, 8, 1, 5, 3, 9, 9, 2, 9, 2, 3, 0, 2, 5, 9, 4, 9, 3, 6, 3, 2, 3, 5, 4, 0, 2, 1, 1, 2, 6, 6, 8, 8, 8, 3, 4, 9, 0, 3, 5, 8 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..97.

FORMULA

zeta''(2) = sum_{k>=1} (log (k)/k)^2.

EXAMPLE

Equals 1.9892802342989010234208586874215163814944...

MAPLE

evalf(Zeta(2, 2)) ;

MATHEMATICA

RealDigits[ Zeta''[2], 10, 97] // First (* Jean-Fran├žois Alcover, Feb 20 2013 *)

CROSSREFS

Cf. A073002, A201995.

Sequence in context: A157371 A245330 A269222 * A243277 A200003 A159590

Adjacent sequences:  A201991 A201992 A201993 * A201995 A201996 A201997

KEYWORD

cons,nonn

AUTHOR

R. J. Mathar, Dec 07 2011

STATUS

approved

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Last modified March 25 16:26 EDT 2019. Contains 321470 sequences. (Running on oeis4.)