a(n) is the concatenation of the first n lucky numbers.

A046278

a(n) is the concatenation of the first n lucky numbers.

Terms

    a(0) =1a(1) =13a(2) =137a(3) =1379a(4) =137913a(5) =13791315a(6) =1379131521a(7) =137913152125

External references