OFFSET
1,1
COMMENTS
For n>2 all terms are divisible by 1806 = 2*3*7*43.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..100
MATHEMATICA
Table[(7^Prime[n] - 6^Prime[n] - 1), {n, 1, 20}] (* Vincenzo Librandi, May 04 2014 *)
7^#-6^#-1&/@Prime[Range[20]] (* Harvey P. Dale, Aug 17 2024 *)
PROG
(Magma) [(7^p-6^p-1): p in PrimesUpTo(100)];
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Mar 07 2012
STATUS
approved