a(0)=1; a(n) = 10^n + 1, n >= 1.

Terms

a(0) =1a(1) =11a(2) =101a(3) =1001a(4) =10001a(5) =100001a(6) =1000001a(7) =10000001a(8) =100000001a(9) =1000000001a(10) =10000000001a(11) =100000000001