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

Author

Eric W. Weisstein, Jan 13 2004

Keywords

• nonn
• cons

Comments

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

Examples

			0.3926990816987...
		

Links

• 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

Crossrefs

Cf. A091494, A019675, A190573, A221208.