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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106009 Primes p such that 20*p +/- 3 are primes. 0
2, 5, 13, 23, 43, 61, 83, 89, 107, 173, 181, 223, 233, 313, 317, 349, 379, 467, 523, 659, 673, 727, 769, 811, 911, 971, 1009, 1051, 1069, 1097, 1153, 1279, 1321, 1433, 1451, 1549, 1559, 1583, 1693, 1777, 1861, 1993, 2029, 2063, 2137, 2213, 2267, 2357, 2441 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

MATHEMATICA

Select[Prime[Range[200]], PrimeQ[20#+3]&&PrimeQ[20#-3]&]

PROG

(MAGMA) [p: p in PrimesUpTo(2500) | IsPrime(20*p-3) and IsPrime(20*p+3)]; [From Vincenzo Librandi, Nov 13 2010]

CROSSREFS

Sequence in context: A049779 A281906 A256491 * A194552 A079780 A178621

Adjacent sequences:  A106006 A106007 A106008 * A106010 A106011 A106012

KEYWORD

nonn

AUTHOR

Zak Seidov, May 05 2005

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.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 19 04:03 EST 2017. Contains 294912 sequences.