Numbers k such that 13^k + 4 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =10a(5) =15a(6) =94a(7) =198a(8) =219a(9) =4543a(10) =11511a(11) =12638a(12) =45606