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A173623 Decimal expansion of Pi*log(2)/2. 6
1, 0, 8, 8, 7, 9, 3, 0, 4, 5, 1, 5, 1, 8, 0, 1, 0, 6, 5, 2, 5, 0, 3, 4, 4, 4, 4, 9, 1, 1, 8, 8, 0, 6, 9, 7, 3, 6, 6, 9, 2, 9, 1, 8, 5, 0, 1, 8, 4, 6, 4, 3, 1, 4, 7, 1, 6, 2, 8, 9, 7, 6, 2, 6, 5, 9, 7, 1, 5, 4, 2, 7, 4, 5, 8, 8, 3, 7, 0, 9, 9, 3, 2, 1, 5, 1, 6, 4, 4, 8, 0, 8, 0, 5, 3, 3, 1, 5, 1, 2, 5, 2, 8, 8, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Equals the absolute value of the integral {x=0..Pi/2} log(sin(x)) dx.

LINKS

Table of n, a(n) for n=1..105.

K. Onodera, Generalized log sine integrals and the Mordell-Tornheim zeta values, Trans. Am. Math. Soc. 363 (3) (2010) 1463.

FORMULA

Equals A086054 / 2.

EXAMPLE

1.08879304515180106525034444...

MAPLE

Pi/2*log(2) ; evalf(%) ;

CROSSREFS

Sequence in context: A088661 A127196 A294795 * A070481 A011109 A248622

Adjacent sequences:  A173620 A173621 A173622 * A173624 A173625 A173626

KEYWORD

cons,nonn

AUTHOR

R. J. Mathar, Nov 08 2010

STATUS

approved

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)