a(n) = (2*10^n + 43)/9.

A173193

a(n) = (2*10^n + 43)/9.

Terms

    a(0) =7a(1) =27a(2) =227a(3) =2227a(4) =22227a(5) =222227a(6) =2222227a(7) =22222227a(8) =222222227a(9) =2222222227a(10) =22222222227a(11) =222222222227

External references