Indices of primes of the form p = 2^i + 2^j + 1, i > j > 0 (A081091).

Terms

a(0) =4a(1) =5a(2) =6a(3) =8a(4) =12a(5) =13a(6) =19a(7) =21a(8) =25a(9) =32a(10) =33a(11) =44a(12) =98a(13) =106a(14) =116a(15) =136a(16) =174a(17) =191a(18) =310a(19) =313a(20) =319a(21) =565a(22) =568a(23) =1029a(24) =1470a(25) =1902a(26) =2111a(27) =3513a(28) =3518a(29) =3521