Svoboda | Graniru | BBC Russia | Golosameriki | Facebook
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A179003 Numbers k such that 2^(2*k-1) mod (2*k+1) is prime. 1
1, 2, 4, 6, 7, 10, 16, 18, 19, 25, 28, 30, 31, 34, 36, 37, 38, 43, 46, 49, 52, 55, 58, 61, 64, 67, 70, 78, 79, 87, 88, 91, 96, 97, 100, 106, 107, 109, 112, 115, 118, 124, 126, 133, 138, 145, 147, 148, 151, 154, 156, 157, 160, 163, 169, 180 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MATHEMATICA
fQ[n_] := PrimeQ@ PowerMod[2, 2 n - 1, 2 n + 1]; Select[ Range@ 180, fQ]
CROSSREFS
Sequence in context: A191200 A026398 A374432 * A318785 A190206 A189287
KEYWORD
nonn
AUTHOR
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 September 11 23:47 EDT 2024. Contains 375842 sequences. (Running on oeis4.)