login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A023209 Numbers n such that n and 3n + 4 both prime. 0
3, 5, 11, 13, 19, 23, 31, 41, 53, 59, 73, 79, 89, 101, 103, 109, 131, 139, 151, 173, 179, 181, 191, 199, 223, 229, 241, 251, 269, 283, 293, 311, 331, 349, 353, 373, 383, 389, 409, 431, 433, 439, 509, 521, 541, 563, 593, 599, 619, 643, 661, 683, 709, 719, 733, 739, 761 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

PROG

(MAGMA) [n: n in [0..1000] | IsPrime(n) and IsPrime(3*n+4)] [From V. Librandi, Nov 18 2010]

CROSSREFS

Sequence in context: A136208 A045405 A059311 * A020609 A151917 A059639

Adjacent sequences:  A023206 A023207 A023208 * A023210 A023211 A023212

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 09:49 EST 2012. Contains 205763 sequences.