a(1) = 7, a(n+1) = smallest multiple of a(n) using only prime digits(2,3,5,7).

A078235

a(1) = 7, a(n+1) = smallest multiple of a(n) using only prime digits(2,3,5,7).

Terms

    a(0) =7a(1) =35a(2) =525a(3) =5775a(4) =225225a(5) =27252225a(6) =73553755275

External references