Smallest prime factor of 3^n - 2^n.

Terms

a(0) =5a(1) =19a(2) =5a(3) =211a(4) =5a(5) =29a(6) =5a(7) =19a(8) =5a(9) =23a(10) =5a(11) =53a(12) =5a(13) =19a(14) =5a(15) =129009091a(16) =5a(17) =1559a(18) =5a(19) =19a(20) =5a(21) =47a(22) =5a(23) =101a(24) =5a(25) =19a(26) =5a(28) =5a(30) =5a(31) =19