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A143582 Denominators of coefficient of x^(n+1/2) in the series expansion of the haversine. 2
1, 3, 20, 56, 576, 1408, 6656, 5120, 278528, 622592, 2752512, 6029312, 52428800, 113246208, 486539264, 1040187392, 11811160064, 15032385536, 317827579904, 223338299392, 5634997092352, 11819749998592, 3298534883328 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
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. A143581.
Sequence in context: A343010 A360417 A281268 * A132404 A062359 A342672
KEYWORD
nonn,frac
AUTHOR
Eric W. Weisstein, Aug 24 2008
STATUS
approved

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)