A091473 Integral_{x>=0} (cos(2x) * Product_{n>=1} cos(x/n)) dx.

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

Offset

0,1

Comments

First differs from Pi/8 (A019675) in the 42nd place.

Links

Table of n, a(n) for n=0..100.

D. H. Bailey, J. M. Borwein, V. Kapoor and E. Weisstein, Ten Problems in Experimental Mathematics

Eric Weisstein's World of Mathematics, Definite Integral

Eric Weisstein's World of Mathematics, Infinite Cosine Product Integral

Example

0.3926990816987...

Crossrefs

Cf. A091494, A019675, A190573, A221208.

Sequence in context: A179655 A357472 A076420 * A019675 A050129 A070343

Adjacent sequences: A091470 A091471 A091472 * A091474 A091475 A091476

Keyword

nonn,cons

Author

Eric W. Weisstein, Jan 13 2004

Status

approved