460984608domain: NAppears in sequencesa(1) = 4, a(n+1) = smallest multiple of a(n) using only composite digits (4,6,8,9,0) and which is not divisible by 10.at n=7A078236a(1) = 6, a(n+1) = smallest multiple of a(n) using only digits (4,6,8,9,0) and not divisible by 10.at n=6A078237