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A153133
Primes of the form 2^n+3^(n-1).
2
3, 7, 17, 43, 113, 307, 857, 20707, 181243, 539633, 14414443, 129402307, 31389448217, 1853028778786433, 5559077746424707, 50031613818476443, 150094772735952593, 8862938260389989451257, 26588814640432479998443
OFFSET
1,1
LINKS
MATHEMATICA
lst={}; Do[p=2^n+3^(n-1); If[PrimeQ[p], AppendTo[lst, p]], {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 15 2009 *)
Select[3^#[[1]]+2^#[[2]]&/@Partition[Range[0, 50], 2, 1], PrimeQ] (* Harvey P. Dale, Feb 19 2015 *)
PROG
(Magma) [a: n in [0..100] | IsPrime(a) where a is 2^n+3^(n-1)];
CROSSREFS
Cf. A082400.
Sequence in context: A078679 A025577 A085279 * A123601 A115325 A294129
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Mar 11 2009
EXTENSIONS
More terms from Vladimir Joseph Stephan Orlovsky, Jun 15 2009
STATUS
approved