Numbers k such that 7*10^k - 89 is prime.

Terms

a(0) =3a(1) =4a(2) =6a(3) =7a(4) =12a(5) =13a(6) =23a(7) =28a(8) =42a(9) =51a(10) =66a(11) =247a(12) =291a(13) =623a(14) =3429a(15) =3892a(16) =4416a(17) =7366a(18) =7991a(19) =8737a(20) =10151a(21) =10209a(22) =40129a(23) =41604a(24) =50818a(25) =68088