  We employ the lattice QCD data on Taylor expansion coefficients up to sixth
order to construct an equation of state at finite net-baryon density. When we
take into account how hadron masses depend on lattice spacing and quark mass,
the coefficients evaluated using the p4 action are equal to those of hadron
resonance gas at low temperature. Thus the parametrised equation of state can
be smoothly connected to the hadron resonance gas equation of state. We see
that the equation of state using Taylor coefficients up to second order is
realistic only at low densities, and that at densities corresponding to s/n_B >
40, the expansion converges by the sixth order term.
