A258759 Decimal expansion of Ls_3(Pi/3), the value of the 3rd basic generalized log-sine integral at Pi/3 (negated).

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

Offset: 1

Author

Jean-François Alcover, Jun 09 2015

Keywords

• nonn
• cons
• easy

Examples

			-2.0096660811305439002623537543491645038479353700110717949908496919...
		

Links

• Jonathan M. Borwein, Armin Straub, Special Values of Generalized Log-sine Integrals.

Crossrefs

Cf. A258749 (Ls_3(Pi)), A258750 (Ls_4(Pi)), A258751 (Ls_5(Pi)), A258752 (Ls_6(Pi)), A258753 (Ls_7(Pi)), A258754 (Ls_8(Pi)).

Cf. A143298 (Ls_2(Pi/3)), A258760 (Ls_4(Pi/3)), A258761 (Ls_5(Pi/3)), A258762 (Ls_6(Pi/3)), A258763 (Ls_7(Pi/3)).

Programs

Mathematica

RealDigits[-7*Pi^3/108, 10, 105] // First

Formula

-Integral_{0..Pi/3} log(2*sin(x/2))^2 dx = -7*Pi^3/108.