a(1) =3, a(n) = smallest multiple of a(n-1) (not equal to 10^k*a(n-1)) obtained by inserting digits anywhere in a(n-1).

A080488

a(1) =3, a(n) = smallest multiple of a(n-1) (not equal to 10^k*a(n-1)) obtained by inserting digits anywhere in a(n-1).

Terms

    a(0) =3a(1) =33a(2) =363a(3) =36663a(4) =32666733a(5) =326699996733

External references