The largest prime divisor of A246053(n).

Terms

a(0) =2a(1) =2a(2) =7a(3) =31a(4) =127a(5) =73a(6) =691a(7) =8191a(8) =3617a(9) =131071a(10) =524287a(11) =593a(12) =2294797a(13) =657931a(14) =362903a(15) =1001259881a(16) =2147483647a(17) =151628697551a(22) =1798482437