Primes p such that [p,p+2] is a pair of twin primes and (p*(p+2)-1)/2 is prime.

Terms

a(0) =3a(1) =5a(2) =11a(3) =29a(4) =41a(5) =71a(6) =137a(7) =281a(8) =461a(9) =599a(10) =641a(11) =827a(12) =881a(13) =1091a(14) =1301a(15) =1607a(16) =2129a(17) =2267a(18) =2381a(19) =2687a(20) =3527a(21) =3557a(22) =3581a(23) =4127a(24) =4229a(25) =4337a(26) =4547a(27) =5009a(28) =5741a(29) =6131