login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons 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 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A023294 Primes that remain prime through 3 iterations of function f(x) = 8x + 7. 3
659, 2549, 5189, 6269, 7229, 7949, 9209, 11579, 16139, 18089, 22739, 25589, 26099, 26339, 29009, 30689, 40289, 51719, 55799, 59669, 60689, 61379, 63599, 69959, 70229, 74609, 85829, 94949, 95819, 102539, 109589, 118169, 121469, 135599, 136889 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes p such that 8*p+7, 64*p+63 and 512*p+511 are also primes. - Vincenzo Librandi, Aug 04 2010

LINKS

John Cerkan, Table of n, a(n) for n = 1..10000

FORMULA

a(n) == 29 (mod 30). - John Cerkan, Sep 23 2016

PROG

(MAGMA) [n: n in [1..450000] | IsPrime(n) and IsPrime(8*n+7) and IsPrime(64*n+63) and IsPrime(512*n+511)] // Vincenzo Librandi, Aug 04 2010

CROSSREFS

Subsequence of A023231, A023263, and A139487.

Sequence in context: A198207 A171393 A349586 * A067235 A113171 A252519

Adjacent sequences:  A023291 A023292 A023293 * A023295 A023296 A023297

KEYWORD

nonn

AUTHOR

David W. Wilson

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 December 3 21:17 EST 2021. Contains 349468 sequences. (Running on oeis4.)