The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A370190 Numbers k such that (6^k + 6*k)/6 is prime. 2
1, 5, 7, 1003, 40513 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
If it exists, a(6) > 62000.
LINKS
Table of n, a(n) for n=1..5.
PROG
(PARI) is(n) = ispseudoprime(6^(n-1)+n)
CROSSREFS
Cf. A058828, A221908, A226200.
Sequence in context: A101829 A056252 A274774 * A176599 A309409 A291687
Adjacent sequences: A370187 A370188 A370189 * A370191 A370192 A370194
KEYWORD
nonn,hard,more
AUTHOR
Hugo Pfoertner, Feb 24 2024
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 May 19 12:15 EDT 2024. Contains 372692 sequences. (Running on oeis4.)