%I #7 Aug 20 2012 17:07:08
%S 1,0,0,-3,0,-30,90,-588,5040,-26520,325080,-2158728,27731880,
%T -249259920,3181258080,-36821629848,482278043520,-6704476956480,
%U 93675256079040,-1479108131816448,22566722722104960,-390679249452835200,6559255213047250560,-122197022127873558528
%N n-th derivative of cos(x)^tan(x) at x=0.
%F E.g.f.: cos(x)^tan(x).
%p a:= n-> n!* coeff(series(cos(x)^tan(x), x, n+1), x, n):
%p seq (a(n), n=0..25);
%t f[x_] := Cos[x]^Tan[x]; Table[Derivative[ n] [f][0],{n,0,25}]
%Y Cf. A215588, A215680.
%K sign
%O 0,4
%A _Michel Lagneau_, Aug 16 2012