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A089919 Numbers k such that 3^prime(k) - 2 is prime. 1
1, 3, 12, 13, 66, 100, 369 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
No additional terms up to n=1000. - Harvey P. Dale, Oct 10 2016
a(8) > 91500, if it exists (based on the data at A014224). - Amiram Eldar, Jul 07 2024
LINKS
FORMULA
a(n) = A000720(A086218(n)). - Amiram Eldar, Jul 07 2024
MATHEMATICA
Select[Range[370], PrimeQ[3^Prime[#]-2]&] (* Harvey P. Dale, Oct 10 2016 *)
PROG
(PARI) f(n) = for(x=1, n, if(ispseudoprime(3^prime(x)-2), print1(x, ", ")))
CROSSREFS
Sequence in context: A353439 A117061 A341799 * A222711 A176796 A242130
KEYWORD
nonn,more
AUTHOR
Cino Hilliard, Jan 11 2004
EXTENSIONS
Definition corrected by Jorge Coveiro, Jan 31 2006, Jul 25 2006
STATUS
approved

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Last modified July 21 18:17 EDT 2024. Contains 374475 sequences. (Running on oeis4.)