Indices of primes in the tetranacci sequence A000288.

Terms

a(0) =5a(1) =6a(2) =10a(3) =11a(4) =12a(5) =13a(6) =18a(7) =30a(8) =31a(9) =36a(10) =38a(11) =97a(12) =108a(13) =150a(14) =196a(15) =221a(16) =277a(17) =532a(18) =596a(19) =2468a(20) =2691a(21) =3773a(22) =4303a(23) =5755a(24) =8925a(25) =10083a(26) =11708a(27) =14080a(28) =19990a(29) =24102