This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A243811 Numbers n such that 2*n+3 and 2*n+5 are both prime. 1
 0, 1, 4, 7, 13, 19, 28, 34, 49, 52, 67, 73, 88, 94, 97, 112, 118, 133, 139, 154, 172, 208, 214, 229, 259, 283, 298, 307, 319, 328, 403, 409, 412, 427, 439, 508, 514, 523, 529, 544, 574, 613, 637, 643, 649, 658, 712, 724, 739, 742, 802, 808, 832, 847, 859, 892, 934 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A040040(n)-2. MATHEMATICA Select[Range[0, 1000], PrimeQ[2 # + 3] && PrimeQ[2 # + 5] &] PROG (MAGMA) [n: n in [0..1000] | IsPrime(2*n+3) and IsPrime(2*n+5)]; CROSSREFS Cf. A040040, A067076, A089038. Sequence in context: A191138 A075315 A238327 * A194073 A023496 A191868 Adjacent sequences:  A243808 A243809 A243810 * A243812 A243813 A243814 KEYWORD nonn,easy,less AUTHOR Vincenzo Librandi, Jun 11 2014 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 21 00:36 EST 2018. Contains 317427 sequences. (Running on oeis4.)