Primes with exactly nine 9's.

Terms

a(0) =9199999999a(1) =9299999999a(2) =9959999999a(3) =9995999999a(4) =9999499999a(5) =9999929999a(6) =9999959999a(7) =9999999929a(8) =10999999999a(9) =16999999999a(10) =19399999999a(11) =19909999999a(12) =19991999999a(13) =19999399999a(14) =19999990999a(15) =19999997999a(16) =19999999199