A088553 Primes of the form (3^k-1)/2 or (3^k+1)/2.
2, 5, 13, 41, 1093, 797161, 21523361, 926510094425921, 1716841910146256242328924544641, 3754733257489862401973357979128773, 6957596529882152968992225251835887181478451547013
Offset: 1
Keywords
Links
- Amiram Eldar, Table of n, a(n) for n = 1..15
Programs
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Mathematica
Select[Flatten[Table[(3^x+{1,-1})/2,{x,150}]],PrimeQ] (* Harvey P. Dale, Dec 04 2018 *)
Extensions
Edited by Don Reble, May 03 2006
Comments