Upper twin primes of upper twin prime index.

Terms

a(0) =31a(1) =61a(2) =181a(3) =283a(4) =811a(5) =1279a(6) =1999a(7) =2551a(8) =3931a(9) =4159a(10) =5659a(11) =6553a(12) =8389a(13) =9241a(14) =9463a(15) =11551a(16) =12253a(17) =14629a(18) =15889a(19) =17923a(20) =20509a(21) =26113a(22) =27109a(23) =29401a(24) =33829a(25) =37993a(26) =41179a(27) =42571a(28) =44623a(29) =46681