  We study the masses and lifetimes of doubly charmed pentaquark $P_{cc\bar
qqq}(q=u,d,s)$ primarily. The operation of masses carried out by the doubly
heavy triquark-diquark model, whose results suggests the existence of stable
states $cc\bar s ud$ with the parity $J^P=\frac{1}{2}^-$. The roughly
calculation about lifetimes show the short magnitudes,
$(4.65^{+0.71}_{-0.55})\times 10^{-13}s $ for the parity $J^P=\frac{1}{2}^-$
and $(0.93^{+0.14}_{-0.11})\times 10^{-12} s $ for $J^P=\frac{3}{2}^-$. Since
the pentaquark $cc\bar s ud$ is interpreted as the stable bound states against
strong decays, then we will focus on the production and possible decay channels
of the pentaquark in the next step, the study would be fairly valuable supports
for future experiments. For completeness, we systematically studied the
production from $\Omega_{ccc}$ and the decay modes in the framework SU(3)
flavor symmetry, including the processes of semi-leptonic and two body
non-leptonic decays. Synthetically, we make a collection of the golden
channels.
