A102047 - OEIS

A102047

Decimal expansion of -1/4 + log(2)/2.

0, 9, 6, 5, 7, 3, 5, 9, 0, 2, 7, 9, 9, 7, 2, 6, 5, 4, 7, 0, 8, 6, 1, 6, 0, 6, 0, 7, 2, 9, 0, 8, 8, 2, 8, 4, 0, 3, 7, 7, 5, 0, 0, 6, 7, 1, 8, 0, 1, 2, 7, 6, 2, 7, 0, 6, 0, 3, 4, 0, 0, 0, 4, 7, 4, 6, 6, 9, 6, 8, 1, 0, 9, 8, 4, 8, 4, 7, 3, 5, 7, 8, 0, 2, 9, 3, 1, 6, 6, 3, 4, 9, 8, 2, 0, 9, 3, 4, 3, 7, 7, 1, 0

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..102.

Eric Weisstein's World of Mathematics, Abel's Integral.

Eric Weisstein's World of Mathematics, Cosine Integral.

Index entries for transcendental numbers

FORMULA

Equals A016655/10 - 1/4. - R. J. Mathar, Dec 13 2008

From Amiram Eldar, Sep 08 2020: (Start)

Equals Sum_{k>=1} (-1)^(k+1)/((2*k+1)^2-1).