a(1) = 7, a(n+1) is the concatenation of a(n) and the next prime after a(n).

A068004

a(1) = 7, a(n+1) is the concatenation of a(n) and the next prime after a(n).

Terms

    a(0) =7a(1) =711a(2) =711719a(3) =711719711727

External references