Numbers k such that 4*10^k - 89 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =9a(4) =11a(5) =12a(6) =20a(7) =27a(8) =89a(9) =131a(10) =309a(11) =1065a(12) =3330a(13) =3928a(14) =5724a(15) =12932a(16) =13383a(17) =20760a(18) =20883a(19) =22202a(20) =28860a(21) =32349a(22) =53324a(23) =60572a(24) =64286a(25) =83354a(26) =83740a(27) =101415a(28) =130088a(29) =197268