Numbers that are not the difference of two primes.

Terms

a(0) =7a(1) =13a(2) =19a(3) =23a(4) =25a(5) =31a(6) =33a(7) =37a(8) =43a(9) =47a(10) =49a(11) =53a(12) =55a(13) =61a(14) =63a(15) =67a(16) =73a(17) =75a(18) =79a(19) =83a(20) =85a(21) =89a(22) =91a(23) =93a(24) =97a(25) =103a(26) =109a(27) =113a(28) =115a(29) =117