login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106060 Primes p such that 1*p + 8 and 8*p + 1 are primes. 0
5, 11, 29, 71, 101, 131, 149, 269, 401, 431, 449, 479, 491, 599, 761, 821, 929, 1229, 1289, 1559, 1571, 1601, 1619, 1871, 2081, 2129, 2339, 2531, 2549, 2609, 2741, 3041, 3209, 3299, 3461, 3719, 3761, 4289, 5189, 5861, 6269, 6359, 6569, 6701, 6959, 7211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Cf. A045536: Primes p such that 1*p+2 and 2*p+1 are prime; A007693: Numbers n such that n and 6*n+1 are primes.

LINKS

Table of n, a(n) for n=1..46.

MATHEMATICA

Select[Prime[Range[220]], PrimeQ[8#+1]&&PrimeQ[1#+8]&]

PROG

(MAGMA) [p: p in PrimesUpTo(10000) | IsPrime(p+8) and IsPrime(8*p+1)]; // Vincenzo Librandi, Nov 13 2010

CROSSREFS

Cf. A007693, A045536.

Sequence in context: A201600 A129780 A154504 * A237642 A059508 A084817

Adjacent sequences:  A106057 A106058 A106059 * A106061 A106062 A106063

KEYWORD

nonn

AUTHOR

Zak Seidov, May 07 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 26 21:07 EST 2021. Contains 349344 sequences. (Running on oeis4.)