Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A157834
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A157834 Numbers n such that 3n-2 and 3n+2 are both prime. +0
1
3, 5, 7, 13, 15, 23, 27, 33, 35, 37, 43, 55, 65, 75, 77, 93, 103, 105, 117, 127, 133, 147, 153, 155, 163, 167, 205, 215, 225, 247, 253, 257, 275, 285, 287, 293, 295, 303, 313, 323, 337, 363, 365, 405, 427, 433, 435, 475, 477, 483, 495, 497, 517 (list; graph; listen)
OFFSET

1,1

FORMULA

Intersection of A024893 and A153183.

a(n) = A029708(n)/3. [From Zak Seidov (zakseidov(AT)yahoo.com), Aug 07 2009]

EXAMPLE

15 +/- 2 = 43,47 (both prime).

CROSSREFS

A024893 (Numbers n such that 3*n+2 is prime), A153183 (Numbers n such that 3n-2 is prime).

Sequence in context: A007591 A097687 A032911 this_sequence A008996 A031163 A106119

Adjacent sequences: A157831 A157832 A157833 this_sequence A157835 A157836 A157837

KEYWORD

nonn

AUTHOR

Kyle D. Balliet (kdballie(AT)bloomu.edu), Mar 07 2009

EXTENSIONS

More terms from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 03 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


AT&T Labs Research