Primes p such that p + 8, p + 12 and p + 20 are also primes.

Terms

a(0) =11a(1) =59a(2) =89a(3) =389a(4) =479a(5) =1439a(6) =1559a(7) =1601a(8) =2531a(9) =2699a(10) =3209a(11) =3449a(12) =3911a(13) =5639a(14) =5849a(15) =7529a(16) =8081a(17) =8669a(18) =10091a(19) =12269a(20) =12401a(21) =12899a(22) =13151a(23) =14411a(24) =14759a(25) =17021a(26) =19421a(27) =21011a(28) =21851a(29) =22271