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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106068 Primes p such that 3p + 4 and 4p + 3 are primes. 2
5, 11, 19, 31, 41, 59, 89, 109, 151, 179, 181, 229, 241, 331, 349, 389, 439, 509, 521, 599, 661, 719, 769, 839, 881, 929, 1019, 1039, 1129, 1229, 1291, 1409, 1451, 1481, 1549, 1669, 1741, 1759, 1801, 1811, 2111, 2131, 2539, 2621, 2671, 2699, 2819, 2879 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Prime terms in A124855.

LINKS

Marius A. Burtea, Table of n, a(n) for n = 1..534

MATHEMATICA

Select[Prime[Range[450]], PrimeQ[4#+3]&&PrimeQ[3#+4]&]

PROG

(Magma) [p: p in PrimesUpTo(5000)|IsPrime(3*p+4) and IsPrime(4*p+3)] // Vincenzo Librandi, Jan 30 2011

(PARI) isok(p) = isprime(p) && isprime(3*p+4) && isprime(4*p+3); \\ Michel Marcus, Oct 12 2018

CROSSREFS

Cf. A034936, A095278, A124855.

Sequence in context: A253936 A191032 A003147 * A304875 A164566 A075322

Adjacent sequences: A106065 A106066 A106067 * A106069 A106070 A106071

KEYWORD

nonn

AUTHOR

Zak Seidov, May 07 2005

EXTENSIONS

Extended by Ray Chandler, Mar 14 2007

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 30 11:20 EST 2022. Contains 358441 sequences. (Running on oeis4.)