Near twin primes of order 18: twin primes (p, p+2) such that p+18 and p+20 are primes.

Terms

a(0) =11a(1) =41a(2) =179a(3) =599a(4) =641a(5) =809a(6) =1031a(7) =1301a(8) =1931a(9) =2111a(10) =2711a(11) =3371a(12) =3539a(13) =4001a(14) =4241a(15) =5501a(16) =5639a(17) =5849a(18) =6551a(19) =6761a(20) =7331a(21) =8819a(22) =9419a(23) =11699a(24) =13691a(25) =15269a(26) =16631a(27) =17189a(28) =17579a(29) =18041