Largest prime factor of 8^n - 3^n.
5, 11, 97, 73, 1301, 97, 418993, 4177, 14563, 3001, 1114829, 277, 13595999, 418993, 19531, 8737, 1466970478531, 14563, 28823037382718881, 241141, 5002537, 1114829, 2511897064955584991, 28513, 103201704493751, 942980117, 33610182283, 418993
1
T. D. Noe, Plot of 100 terms
T. D. Noe, Table of 100 terms
Eric W. Weisstein, MathWorld: Greatest Prime Factor
(Mma) Table[FactorInteger[8^n - 3^n][[-1, 1]], {n, 40}]
nonn
T. D. Noe, Jun 08 2015