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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A062403 Primes of the form 2*k*prime(k) + 1. 1
 5, 13, 31, 157, 239, 683, 1697, 3067, 4273, 5563, 6323, 6781, 9043, 13841, 16427, 22247, 22901, 23767, 27109, 32687, 33721, 45833, 58217, 61933, 83341, 90583, 94811, 115979, 158161, 172751, 193619, 202877, 221567, 284233, 297967, 308773 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harry J. Smith, Table of n, a(n) for n = 1..1000 MAPLE select(isprime, [seq(2*i*ithprime(i)+1, i=1..200)]); # Muniru A Asiru, Jun 29 2018 PROG (PARI) je=[]; for(n=0, 200, if(isprime(2*n*prime(n)+1), je=concat(je, 2*n*prime(n)+1), )); je (PARI) { n=c=0; forprime (p=2, 5*10^5, q=2*(c++)*p + 1; if (isprime(q), write("b062403.txt", n++, " ", q); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 07 2009 CROSSREFS Sequence in context: A146368 A147424 A146057 * A066688 A046789 A271902 Adjacent sequences: A062400 A062401 A062402 * A062404 A062405 A062406 KEYWORD easy,nonn AUTHOR Jason Earls, Jul 08 2001 EXTENSIONS Definition corrected by Harry J. Smith, Aug 07 2009 Name simplified by Jon E. Schoenfield, Jun 29 2018 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 September 22 18:47 EDT 2023. Contains 365531 sequences. (Running on oeis4.)