The smallest prime with a possible given digit sum.

Terms

a(0) =2a(1) =3a(2) =13a(3) =5a(4) =7a(5) =17a(6) =19a(7) =29a(8) =67a(9) =59a(10) =79a(11) =89a(12) =199a(13) =389a(14) =499a(15) =599a(16) =997a(17) =1889a(18) =1999a(19) =2999a(20) =4999a(21) =6899a(22) =17989a(23) =8999a(24) =29989a(25) =39989a(26) =49999a(27) =59999a(28) =79999a(29) =98999