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A289716
Primes of the form 3^k - 16.
1
11, 227, 177131, 14348891, 2153693963075557766310731, 834385168331080533771857328695267, 171792506910670443678820376588540424234035840651, 2025465365549235636389379590279612045176776005882811610332067323733925450296747107485272801773488928849912971
OFFSET
1,1
LINKS
F. Firoozbakht and M. F. Hasler, Variations on Euclid's formula for Perfect Numbers, JIS 13 (2010) #10.3.1.
Henri and Renaud Lifchitz, PRP Records
OpenPFGW Project, Primality Tester
FORMULA
a(n) = 3^A219039(n) - 16. - Elmo R. Oliveira, Nov 12 2023
MATHEMATICA
Select[Table[3^k - 16], {k, 3, 100}], PrimeQ[#] &]
CROSSREFS
Cf. A000040, A219039 (corresponding k's).
Sequence in context: A170948 A245076 A120850 * A305141 A296592 A108518
KEYWORD
nonn
AUTHOR
Robert Price, Sep 02 2017
STATUS
approved