login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A143252 Numbers n such that 2*41^n + 1 is prime. 0

%I

%S 0,1,819,1449,1677,13319

%N Numbers n such that 2*41^n + 1 is prime.

%C Primes found and proved by PrimeForm. No more terms up to 30000.

%o (PARI) is(n)=ispseudoprime(2*41^n+1) \\ _Charles R Greathouse IV_, Jun 13 2017

%Y Cf. A141802.

%K hard,nonn

%O 1,3

%A _Rick L. Shepherd_, Aug 02 2008

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 September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)