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A088553 Primes of the form (3^x-1)/2 or (3^x+1)/2. 3
2, 5, 13, 41, 1093, 797161, 21523361, 926510094425921, 1716841910146256242328924544641, 3754733257489862401973357979128773, 6957596529882152968992225251835887181478451547013 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The next term is too large to include.
The next term has 258 digits. - Harvey P. Dale, Dec 04 2018
LINKS
MATHEMATICA
Select[Flatten[Table[(3^x+{1, -1})/2, {x, 150}]], PrimeQ] (* Harvey P. Dale, Dec 04 2018 *)
CROSSREFS
Cf. A096723.
Sequence in context: A007269 A179264 A096724 * A262934 A149869 A149870
KEYWORD
nonn
AUTHOR
Cino Hilliard, Nov 17 2003
EXTENSIONS
Edited by Don Reble, May 03 2006
STATUS
approved

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Last modified March 19 07:04 EDT 2024. Contains 370953 sequences. (Running on oeis4.)