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 A216744 #10 Sep 08 2022 08:46:03
%S A216744 5,7,13,23,29,31,37,47,53,61,71,79,101,103,109,127,131,149,151,157,
%T A216744 167,173,181,191,197,199,223,229,239,263,269,271,277,293,311,313,317,
%U A216744 349,359,367,373,383,389,397,421,431,439,443,461,463,479,487,503,509,521,541
%N A216744 Primes p such that x^26 = -2 has no solution mod p.
%C A216744 Complement of A051082 relative to A000040.
%H A216744 Vincenzo Librandi, <a href="/A216744/b216744.txt">Table of n, a(n) for n = 1..1000</a>
%t A216744 ok[p_]:= Reduce[Mod[x^26 + 2, p] == 0, x, Integers] == False; Select[Prime[Range[110]], ok]
%o A216744 (Magma) [ p: p in PrimesUpTo(600) | not exists{x : x in ResidueClassRing(p) | x^26 eq -2} ]; // _Vincenzo Librandi_, Sep 16 2012
%Y A216744 Cf. A000040, A051082.
%K A216744 nonn,easy
%O A216744 1,1
%A A216744 _Vincenzo Librandi_, Sep 15 2012