a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of successive numbers. Terms with more than one digit must be a concatenation of at least two successive numbers.

A094333

a(1) = 1, a(n) = least proper multiple of a(n-1) which is a concatenation of successive numbers. Terms with more than one digit must be a concatenation of at least two successive numbers.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =56a(5) =5152a(6) =17181920a(7) =479839479840

External references