a(n) is the smallest number > 1 such that the concatenation a(1)a(2)...a(n) is a perfect power.

A264733

a(n) is the smallest number > 1 such that the concatenation a(1)a(2)...a(n) is a perfect power.

Terms

    a(0) =4a(1) =9a(2) =13a(3) =31556a(4) =4433200001

External references