Numbers n such that n and n+5 are prime powers.

Terms

a(0) =2a(1) =3a(2) =4a(3) =8a(4) =11a(5) =27a(6) =32a(7) =59a(8) =251a(9) =1019a(10) =2048a(11) =4091a(12) =262139a(13) =1048571a(14) =67108859a(15) =4294967291a(16) =68719476731