Numbers k such that 5^k + 2 is a prime.

Terms

a(0) =0a(1) =1a(2) =3a(3) =17a(4) =143a(5) =261a(6) =551a(7) =2285a(8) =18731a(9) =18995a(10) =19751a(11) =62067a(12) =98051a(13) =169727a(14) =442281