Composite numbers in A182140 but not in A071700.

Terms

a(0) =255a(1) =385a(2) =34561a(3) =65535a(4) =147455a(5) =195841a(6) =1034881a(7) =4070401a(8) =4746241a(9) =5040001a(10) =16675201a(11) =22704001a(12) =36067201a(13) =47013121a(14) =83623935a(15) =136967041a(16) =168720001a(17) =271878145a(18) =549141119a(19) =613092481a(20) =836567041a(21) =1039779841a(22) =1049759999a(23) =1548072961a(24) =2556902401a(25) =2646067201