This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A125884 #13 Aug 02 2025 13:16:37
%S A125884 3,4,5,8,9,16,18,30,34,36,41,48,49,51,54,61,65,69,76,81,86,89,90,95,
%T A125884 101,109,120,141,170,171,178,196,221,235,238,244,260,263,273,280,291,
%U A125884 301,303,310,311,326,350,361,375,391,398,404,405,406,423,429,431,454,456,464,479,484,485,486,489,499
%N A125884 Numbers k for which k^6+k^5-1 is prime.
%H A125884 Robert Israel, <a href="/A125884/b125884.txt">Table of n, a(n) for n = 1..10000</a>
%p A125884 select(t -> isprime(t^6+t^5-1), [$1..1000]); # _Robert Israel_, Jan 08 2017
%t A125884 Do[If[PrimeQ[x^6 + x^5 - 1], Print[x]], {x, 1, 200}]
%o A125884 (PARI) is(n)=isprime(n^6+n^5-1) \\ _Charles R Greathouse IV_, May 15 2013
%Y A125884 Cf. A000040, A045546, A125881, A125882, A125883, A125885.
%K A125884 nonn
%O A125884 1,1
%A A125884 _Artur Jasinski_, Dec 14 2006
%E A125884 More terms from _Robert Israel_, Jan 08 2017