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A204768
7^p - 6^p - 1, with p = prime(n).
4
12, 126, 9030, 543606, 1614529686, 83828316390, 215703854542470, 10789535445362646, 26579017117027313526, 3183060102526390833854310, 156448938516521406467644086, 18500229372226631089176131976870
OFFSET
1,1
COMMENTS
For n>2 all terms are divisible by 1806 = 2*3*7*43.
LINKS
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
Cf. A016169.
Sequence in context: A062199 A199528 A124797 * A045508 A215774 A275941
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Mar 07 2012
STATUS
approved