The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #2 Apr 30 2014 01:28:34
%S 1,3,90,945,12600,53460,10216206000,1021620600,534386160000,
%T 2494674910728000,2744142401800800000,1456506351725040000,
%U 68921880563628892800000,39762623402093592000000
%N Denominators of coefficients in cosh(x) / sin(x) power series.
%e cosh(x)/sin(x) = -1/x + 2/3*x + 13/90*x^3 + 19/945*x^5 +...
%Y Cf. A097234, A069854. Bisection of A007451.
%K nonn,frac
%O -1,2
%A _Ralf Stephan_, Aug 01 2004