Numbers k such that (43*10^k - 403)/9 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =11a(5) =20a(6) =23a(7) =24a(8) =26a(9) =36a(10) =56a(11) =224a(12) =411a(13) =543a(14) =611a(15) =1541a(16) =1632a(17) =3719a(18) =3888a(19) =4917a(20) =11454a(21) =24275a(22) =51816a(23) =58563a(24) =119024