Upper prime of a difference of 4 between consecutive primes.

Terms

a(0) =11a(1) =17a(2) =23a(3) =41a(4) =47a(5) =71a(6) =83a(7) =101a(8) =107a(9) =113a(10) =131a(11) =167a(12) =197a(13) =227a(14) =233a(15) =281a(16) =311a(17) =317a(18) =353a(19) =383a(20) =401a(21) =443a(22) =461a(23) =467a(24) =491a(25) =503a(26) =617a(27) =647a(28) =677a(29) =743