“…In the literature, there are lots of works in classifying symmetric graphs of order kp n and small valency d, especially with n and k small and d = 3, 4, or 5; see [6,7,12,13,24,25,27] for example. In particular, cubic or pentavalent symmetric basic graphs of order 2p n for variable prime p and integer n were classified completely in [6,7], and tetravalent 2-arc-transitive basic graphs of order 2p n were classified in [27].…”