Numbers k such that 10^k + 103 is prime.

Terms

a(0) =1a(1) =3a(2) =4a(3) =5a(4) =7a(5) =9a(6) =10a(7) =11a(8) =27a(9) =35a(10) =85a(11) =169a(12) =209a(13) =221a(14) =321a(15) =347a(16) =603a(17) =610a(18) =1229a(19) =1391a(20) =2171a(21) =2303a(22) =2679a(23) =3977a(24) =4545a(25) =5721a(26) =7090a(27) =35877