The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A058586 Numbers n such that 5*2^n + 3 is prime. 1
 1, 2, 3, 4, 5, 7, 8, 11, 12, 18, 20, 26, 28, 32, 34, 43, 44, 50, 52, 58, 65, 66, 107, 140, 197, 274, 280, 380, 393, 506, 664, 738, 875, 944, 1016, 1547, 1548, 1687, 3938, 4066, 5165, 6258, 6402, 7067, 7413, 7967, 9441, 9922, 11106 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS MATHEMATICA Do[ If[ PrimeQ[ 5*2^n + 3 ], Print[ n ] ], {n, 1, 10000} ] PROG (PARI) is(n)=ispseudoprime(5*2^n+3) \\ Charles R Greathouse IV, Jun 12 2017 CROSSREFS Cf. A068713(n-1) - 1. A068713(n-1) + 1. Sequence in context: A331418 A062890 A259626 * A090467 A177202 A053868 Adjacent sequences:  A058583 A058584 A058585 * A058587 A058588 A058589 KEYWORD nonn AUTHOR Robert G. Wilson v, Dec 26 2000 STATUS approved

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

Last modified May 11 12:31 EDT 2021. Contains 343791 sequences. (Running on oeis4.)