Sums of the form (twin primes + 1) which are also an upper twin prime.

Terms

a(0) =13a(1) =61a(2) =1321a(3) =1621a(4) =4261a(5) =5101a(6) =6661a(7) =6781a(8) =11701a(9) =12541a(10) =21061a(11) =66361a(12) =83221a(13) =88261a(14) =107101a(15) =110881a(16) =114661a(17) =127681a(18) =130201a(19) =140761a(20) =141961a(21) =144541a(22) =148201a(23) =149521a(24) =157561a(25) =161341a(26) =163861a(27) =175081a(28) =186481a(29) =204601