  We point out that a newly introduced recursive algorithm for lattice polymers
has a much wider range of applicability. In particular, we apply it to the
simulation of off-lattice polymers with Lennard-Jones potentials between
non-bonded monomers and either delta or harmonic potentials between bonded
monomers. Our algorithm allows particularly easy calculations of the free
energy, and seems in general more efficient than other existing algorithms.
