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A138943
Primes of the form (16^n - 3^n)/13.
0
19, 313, 1635972917889127228189253483929940713
OFFSET
1,1
COMMENTS
The next term has 562 digits. - Harvey P. Dale, Mar 28 2013
MATHEMATICA
a={}; Do[p=(16^n-3^n)/13; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 10^2}]; a
Select[Table[(16^n-3^n)/13, {n, 500}], PrimeQ] (* Harvey P. Dale, Mar 28 2013 *)
CROSSREFS
Cf. A128030.
Sequence in context: A032631 A142430 A180845 * A111420 A166965 A372193
KEYWORD
nonn,bref
AUTHOR
STATUS
approved