a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of two or more successive numbers.

A225796

a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of two or more successive numbers.

Terms

    a(0) =1a(1) =12a(2) =456a(3) =415416a(4) =194191194192

External references