  We derive and discuss the solution of the Boltzmann equations for
leptogenesis in a phenomenologically viable SU(5) x A5 golden ratio flavour
model proposed in arXiv:1410.2057 [hep-ph], arXiv:1502.00110 [hep-ph] . The
model employs, in particular, the seesaw mechanism of neutrino mass generation.
We find that the results on the baryon asymmetry of the Universe, obtained
earlier in arXiv:1502.00110 [hep-ph] using approximate analytic expressions for
the relevant CP violating asymmetry and efficiency factors, are correct, as was
expected, up to 20-30 %. The phenomenological predictions for the low energy
neutrino observables, derived using values of the parameters of the model for
which we reproduce the observed value of the baryon asymmetry, change little
with respect to those presented in arXiv:1502.00110 [hep-ph]. Among the many
predictions of the model we find, for instance, that the neutrinoless double
beta decay effective Majorana mass m_ee lies between 3.3 meV and 14.3 meV.
