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!)
A171554 Numbers n such that 1+9*10^n+100^n is prime. 0
0, 1, 5, 71, 311 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
No more terms up to n=7200.
LINKS
MATHEMATICA
Select[Range[0, 320], PrimeQ[1+9 10^#+100^#]&] (* Harvey P. Dale, Nov 23 2023 *)
PROG
(PARI) is(n)=ispseudoprime(1+9*10^n+100^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A265030 A295332 A123077 * A197405 A295536 A197427
KEYWORD
more,nonn
AUTHOR
Jason Earls, Dec 11 2009
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 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)