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!)
A301519 Numbers k such that 4*k^k + 1 is prime. 3

%I #19 Apr 06 2018 09:34:48

%S 0,1,2,3,7,25,7143,11583

%N Numbers k such that 4*k^k + 1 is prime.

%C a(9) > 20000, if it exists. All terms correspond to certified primes. - _Giovanni Resta_, Apr 06 2018

%t Flatten[{0, Select[Range[1000], PrimeQ[4*#^# + 1] &]}] (* _Vaclav Kotesovec_, Mar 25 2018 *)

%o (PARI) for(n=0, 100, if(isprime(4*n^n+1), print1(n", ")))

%Y Cf. A110932, A160600, A301520, A301522.

%K nonn,more

%O 1,3

%A _Seiichi Manyama_, Mar 23 2018

%E a(7)-a(8) from _Giovanni Resta_, Apr 06 2018

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 March 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)