  We present a calculation of the decay constant of the pion, and its
lowest-lying three excitations, at three values of the pion mass between around
400 and 700 MeV, using anisotropic clover lattices. We use the variational
method to determine an optimal interpolating operator for each of the states.
We find that the decay constant of the first excitation, and more notably of
the second, is suppressed with respect to that of the ground-state pion, but
that the suppression shows little dependence on the quark mass.
