Indices of primes of the form 2^t*3^u + 1 in the primes.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =7a(6) =8a(7) =12a(8) =21a(9) =25a(10) =29a(11) =38a(12) =44a(13) =55a(14) =84a(15) =93a(16) =106a(17) =136a(18) =191a(19) =211a(20) =232a(21) =378a(22) =422a(23) =483a(24) =539a(25) =1272a(26) =1470a(27) =2014a(28) =2111a(29) =4144