Primes of the form 2^k + 29.

Terms

a(0) =31a(1) =37a(2) =61a(3) =157a(4) =541a(5) =8221a(6) =32797a(7) =131101a(8) =8388637a(9) =134217757a(10) =8589934621a(11) =137438953501