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 A111092 #15 Sep 08 2022 08:45:20
%S A111092 71,139,211,281,349,419,421,491,631,701,769,839,911,1049,1051,1259,
%T A111092 1399,1471,1609,1889,2029,2099,2239,2309,2311,2381,2521,2591,2659,
%U A111092 2729,2731,2801,2939,3011,3079,3221,3359,3361
%N A111092 Primes congruent to {1,69} mod 70.
%C A111092 For every prime p here, the cyclotomic polynomial Phi(35p,x) is flat.
%H A111092 Vincenzo Librandi, <a href="/A111092/b111092.txt">Table of n, a(n) for n = 1..1000</a>
%t A111092 Select[Prime[Range[500]], MemberQ[{1, 69}, Mod[#, 70]] &] (* _Vincenzo Librandi_, Aug 14 2012 *)
%o A111092 (Magma) [p: p in PrimesUpTo(4000) | p mod 70 in [1, 69]]; // _Vincenzo Librandi_, Aug 14 2012
%Y A111092 Cf. A000040, A117223.
%K A111092 nonn,easy
%O A111092 1,1
%A A111092 _Giorgio Balzarotti_ and _Paolo P. Lava_, Oct 13 2005
%E A111092 Edited by _T. D. Noe_, May 19 2009