Indices of prime Fibonacci 5-step numbers, A001591.

Terms

a(0) =3a(1) =7a(2) =8a(3) =25a(4) =146a(5) =169a(6) =182a(7) =751a(8) =812a(9) =1507a(10) =1591a(11) =3157a(12) =3752a(13) =10651a(14) =12740a(15) =71804a(16) =155953