Numbers k such that 9*10^k+1 is prime.

Terms

a(0) =3a(1) =4a(2) =5a(3) =9a(4) =22a(5) =27a(6) =36a(7) =57a(8) =62a(9) =78a(10) =201a(11) =537a(12) =696a(13) =790a(14) =905a(15) =1038a(16) =66886a(17) =70500a(18) =91836a(19) =100613a(20) =127240a(21) =380734a(22) =583696a(23) =719055a(24) =823037a(25) =862868