Terms in A247665 which are neither primes nor prime powers, in order of appearance.

Terms

a(0) =15a(1) =14a(2) =85a(3) =57a(4) =161a(5) =319a(6) =403a(7) =259a(8) =451a(9) =559a(10) =235a(11) =901a(12) =177a(13) =1159a(14) =1541a(15) =781a(16) =2117a(17) =1027a(18) =2573a(19) =445a(20) =1649a(21) =1121a(22) =122a(23) =707a(24) =851a(25) =1133a(26) =2911a(27) =3103a(28) =1417a(29) =3397