Primes that are 2 less than a perfect power m^k, k >= 2.

Terms

a(0) =2a(1) =7a(2) =23a(3) =47a(4) =79a(5) =167a(6) =223a(7) =241a(8) =359a(9) =439a(10) =727a(11) =839a(12) =1087a(13) =1223a(14) =1367a(15) =1847a(16) =2207a(17) =2399a(18) =3023a(19) =3373a(20) =3719a(21) =3967a(22) =4759a(23) =5039a(24) =5623a(25) =5927a(26) =6857a(27) =7919a(28) =8647a(29) =10607