A143582 Denominators of coefficient of x^(n+1/2) in the series expansion of the haversine.

1, 3, 20, 56, 576, 1408, 6656, 5120, 278528, 622592, 2752512, 6029312, 52428800, 113246208, 486539264, 1040187392, 11811160064, 15032385536, 317827579904, 223338299392, 5634997092352, 11819749998592, 3298534883328

Offset: 1

Author

Eric W. Weisstein, Aug 24 2008

Keywords

• nonn
• frac

Examples

			2*sqrt(z) + z^(3/2)/3 + (3*z^(5/2))/20 + (5*z^(7/2))/56 + (35*z^(9/2))/576 + ...
		

Links

• Eric Weisstein's World of Mathematics, Inverse Haversine

Crossrefs

Cf. A143581.