A125885 - OEIS

%I #10 Mar 18 2020 07:31:31

%S 2,4,12,17,27,39,45,46,72,94,105,106,122,126,147,149,151,156,160,161,

%T 166,169,171,172,192,194,204,205,209,230,235,242,252,260,264,266,276,

%U 280,285,306,309,319,330,335,357,371,387,400,402,411,422,439,442,451,459

%N Numbers k for which k^7+k^6-1 is prime.

%H Amiram Eldar, <a href="/A125885/b125885.txt">Table of n, a(n) for n = 1..10000</a>

%t Do[If[PrimeQ[x^7 + x^6 - 1], Print[x]], {x, 1, 200}]

%o (PARI) is(n)=isprime(n^7+n^6-1) \\ _Charles R Greathouse IV_, May 15 2013

%Y Cf. A000040, A045546, A125881, A125882, A125883, A125884.

%K nonn

%O 1,1

%A _Artur Jasinski_, Dec 14 2006

%E More terms from _Amiram Eldar_, Mar 18 2020