Duplicate of A054750.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =29a(5) =67a(6) =89a(7) =199a(8) =599a(9) =2999a(10) =4999a(11) =29989a(12) =59999a(13) =79999a(14) =389999a(15) =989999