Numbers k such that (11*10^k + 91)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =9a(7) =15a(8) =27a(9) =29a(10) =39a(11) =62a(12) =77a(13) =106a(14) =114a(15) =357a(16) =555a(17) =962a(18) =1013a(19) =2372a(20) =8235a(21) =16047a(22) =82323a(23) =294308