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 A228034 #15 Sep 08 2022 08:46:05
%S A228034 3,11,83,6563,59051,4782971,282429536483,2541865828331,
%T A228034 150094635296999123,57264168970223481226273458862846808078011946891,
%U A228034 30432527221704537086371993251530170531786747066637051
%N A228034 Primes of the form 9^n + 2.
%H A228034 Vincenzo Librandi, <a href="/A228034/b228034.txt">Table of n, a(n) for n = 1..16</a>
%H A228034 Darij Grinberg, <a href="http://www.cip.ifi.lmu.de/~grinberg/t/19s/notes.pdf">Introduction to Modern Algebra</a> (UMN Spring 2019 Math 4281 Notes), University of Minnesota (2019).
%t A228034 Select[Table[9^n + 2, {n, 0, 300}], PrimeQ]
%o A228034 (Magma) [a: n in [0..300] | IsPrime(a) where a is 9^n+2];
%Y A228034 Cf. A004051 (primes of the form 2^a+3^b), A057735 (primes of the form 3^n+2), A090649 (associated n), A104070 (primes of the form 2^n+9), A159352 (primes of the form 10^n+3), A176495 (primes of the form 27^n+2), A182330 (primes of the form 5^n+2).
%K A228034 nonn,easy
%O A228034 1,1
%A A228034 _Vincenzo Librandi_, Aug 11 2013