Prime(prime(n)) when prime(prime(n)) and n are twin primes.

Terms

a(0) =11a(1) =31a(2) =59a(3) =179a(4) =599a(5) =1063a(6) =1153a(7) =1787a(8) =2381a(9) =4091a(10) =4273a(11) =5869a(12) =6661a(13) =9461a(14) =9859a(15) =14867a(16) =15641a(17) =17987a(18) =20773a(19) =20899a(20) =27689a(21) =30557a(22) =39239a(23) =43651a(24) =43889a(25) =61979a(26) =63391a(27) =66749a(28) =66851a(29) =68821