We report on synchronous operation of series arrays of inductively coupled superconducting quantum interference devices (SQUIDs). Each array consisted ofN=3 or 11 dc SQUIDs with common inductances providing a strong interaction between neighboring cells. Externally shunted (&bgr;c≊1) trilayer Nb—AlOx—Nb Josephson junctions were used. Coherent radiation was detected in the frequency rangef=67–73 GHz while the array voltage wasVN=Nf&Fgr;0(&Fgr;0=2.07×10−15V s). The stability of the coherent state was influenced by the external dc magnetic field. The linewidth depended on the external loading. For small loading it wasNtimes smaller than expected for a single cell. The influence of the inductive coupling mechanism on the operation of discrete Josephson junction circuits and the similarity to the coupling in layered structures of long Josephson junctions is discussed.