login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143581 Numerators of coefficient of x^(n+1/2) in the series expansion of the haversine. 1
2, 1, 3, 5, 35, 63, 231, 143, 6435, 12155, 46189, 88179, 676039, 1300075, 5014575, 9694845, 100180065, 116680311, 2268783825, 1472719325, 34461632205, 67282234305, 17534158031, 514589420475, 8061900920775, 5267108601573 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Eric Weisstein's World of Mathematics, Inverse Haversine

EXAMPLE

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

CROSSREFS

Cf. A143582.

Cf. A055786. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 05 2008]

Sequence in context: A049902 A096631 A144057 * A096871 A077890 A077877

Adjacent sequences:  A143578 A143579 A143580 * A143582 A143583 A143584

KEYWORD

nonn,frac

AUTHOR

E. W. Weisstein (eric(AT)weisstein.com), Aug 24, 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 08:44 EST 2012. Contains 205998 sequences.