%I A143582
%S A143582 1,3,20,56,576,1408,6656,5120,278528,622592,2752512,6029312,52428800,
%T A143582 113246208,486539264,1040187392,11811160064,15032385536,317827579904,
%U A143582 223338299392,5634997092352,11819749998592,3298534883328
%N A143582 Denominators of coefficient of x^(n+1/2) in the series expansion of the 
               haversine.
%H A143582 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               InverseHaversine.html">Inverse Haversine</a>
%e A143582 2*Sqrt[z] + z^(3/2)/3 + (3*z^(5/2))/20 + (5*z^(7/2))/56 + (35*z^(9/2))/
               576 + ...
%Y A143582 Cf. A143581.
%Y A143582 Sequence in context: A075358 A002461 A031106 this_sequence A132404 A062359 
               A099721
%Y A143582 Adjacent sequences: A143579 A143580 A143581 this_sequence A143583 A143584 
               A143585
%K A143582 nonn,frac
%O A143582 1,2
%A A143582 E. W. Weisstein (eric(AT)weisstein.com), Aug 24, 2008