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!)
A125967 Numbers n for which n^9+n^8-1 is prime. 1

%I #9 Oct 08 2019 12:31:15

%S 14,21,27,42,51,53,69,78,90,104,111,128,137,149,156,159,190,219,231,

%T 247,254,289,315,322,330,331,336,344,354,397,414,432,442,449,452,456,

%U 469,473,491,511,541,551,566,581,614,621,648,683,687,692,698,699,702,707,740,771,772,775,813,820,832

%N Numbers n for which n^9+n^8-1 is prime.

%H Robert Israel, <a href="/A125967/b125967.txt">Table of n, a(n) for n = 1..10000</a>

%p filter:= k -> isprime(k^9+k^8-1):

%p select(filter, [$1..1000]); # _Robert Israel_, Oct 07 2019

%t Do[If[PrimeQ[x^9 + x^8 - 1], Print[x]], {x, 1, 400}]

%o (PARI) is(n)=isprime(n^9+n^8-1) \\ _Charles R Greathouse IV_, May 15 2013

%Y Cf. A000040, A045546, A125881-A125885, A125965-A125973.

%K nonn

%O 1,1

%A _Artur Jasinski_, Dec 14 2006

%E More terms from _Robert Israel_, Oct 07 2019

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 April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)