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 A102874 #20 Nov 11 2023 13:55:22
%S A102874 17,23,41,257,743,19697,59063,847288609457,
%T A102874 57264168970223481226273458862846808078011946903,
%U A102874 16173092699229880893718618465586445357583280647840659957623
%N A102874 Primes of the form 3^k + 14.
%C A102874 The sequence of corresponding n starts 1, 2, 3, 5, 6, 9, 10, 25, 98, 122, 153, 190, 258, 511, 549, ... (complete up to 10^3). [_Joerg Arndt_, Jul 19 2012]
%H A102874 Vincenzo Librandi, <a href="/A102874/b102874.txt">Table of n, a(n) for n = 1..18</a>
%F A102874 a(n) = 3^A219035(n) + 14. - _Elmo R. Oliveira_, Nov 11 2023
%t A102874 Select[Table[3^n+14,{n,0,200}],PrimeQ] (* _Vincenzo Librandi_, Jul 19 2012 *)
%o A102874 (Magma) [ a: n in [0..200] | IsPrime(a) where a is 3^n+14 ]; // _Vincenzo Librandi_, Jul 19 2012
%Y A102874 Cf. A000040, A219035 (corresponding k's).
%K A102874 nonn
%O A102874 1,1
%A A102874 _Roger L. Bagula_, Mar 01 2005
%E A102874 Edited by _N. J. A. Sloane_ at the suggestion of _Andrew S. Plewe_, May 16 2007