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 A059243 #7 Sep 08 2022 08:45:02
%S A059243 173,431,947,1033,1291,1549,1721,1979,2237,2753,3011,3527,3613,4129,
%T A059243 4817,4903,5333,5591,5849,6451,6709,6967,7741,8171,8429,9203,9461,
%U A059243 9547,9719,10321,10837,11353,11783,12041,13159,13331,13417,13933,14621
%N A059243 Primes p such that x^43 = 2 has no solution mod p.
%C A059243 Complement of A058853 relative to A000040.
%H A059243 Vincenzo Librandi, <a href="/A059243/b059243.txt">Table of n, a(n) for n = 1..1000</a>
%t A059243 ok[p_]:= Reduce[Mod[x^43 - 2, p] == 0, x, Integers] == False; Select[Prime[Range[4000]], ok] (* _Vincenzo Librandi_, Sep 20 2012 *)
%o A059243 (Magma) [p: p in PrimesUpTo(15000) | not exists{x : x in ResidueClassRing(p) | x^43 eq 2} ]; // _Vincenzo Librandi_, Sep 20 2012
%Y A059243 Cf. A000040, A058853.
%K A059243 easy,nonn
%O A059243 1,1
%A A059243 _Klaus Brockhaus_, Jan 21 2001