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 A199821 #14 Sep 08 2022 08:46:00 %S A199821 23,397,16344637 %N A199821 Primes of form 12^n-11^n. %H A199821 Vincenzo Librandi, <a href="/A199821/b199821.txt">Table of n, a(n) for n = 1..6</a> %t A199821 Select[12^Range[3000]-11^Range[3000],PrimeQ] %o A199821 (Magma) [ a: n in [0..300] | IsPrime(a) where a is 12^n-11^n ] %Y A199821 Cf. A016197 %K A199821 nonn,more,bref %O A199821 1,1 %A A199821 _Vincenzo Librandi_, Nov 21 2011