Numbers k such that 2*10^k + 89 is prime.

Terms

a(0) =1a(1) =3a(2) =4a(3) =8a(4) =9a(5) =10a(6) =13a(7) =20a(8) =27a(9) =74a(10) =89a(11) =93a(12) =137a(13) =139a(14) =296a(15) =310a(16) =662a(17) =749a(18) =1249a(19) =2540a(20) =2848a(21) =3309a(22) =8677a(23) =11573a(24) =15286a(25) =17125a(26) =39526a(27) =42187a(28) =44476a(29) =47823