The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 Table of n, a(n) for n=1..7. 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 Cf. A000720, A014224, A086218. Sequence in context: A353439 A117061 A341799 * A222711 A176796 A242130 Adjacent sequences: A089916 A089917 A089918 * A089920 A089921 A089922 KEYWORD nonn,more AUTHOR Cino Hilliard, Jan 11 2004 EXTENSIONS Definition corrected by Jorge Coveiro, Jan 31 2006, Jul 25 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

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