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 A058829 #25 Dec 11 2022 15:08:54
%S A058829 1,19,43,607,889,3727,12229,124433,246229
%N A058829 Numbers k such that 6^k - k is prime.
%C A058829 a(8) > 30000. - _Giovanni Resta_, Apr 07 2013
%C A058829 a(9) > 2*10^5. - _Robert Price_, Jan 21 2014
%t A058829 Do[ If[ PrimeQ[6^n - n], Print[n] ], {n, 2500} ]
%t A058829 Select[Range[4000], PrimeQ[(6^# - #)] &] (* _Vincenzo Librandi_, Sep 29 2012 *)
%o A058829 (PARI) is(n)=ispseudoprime(6^n-n) \\ _Charles R Greathouse IV_, Feb 20 2017
%Y A058829 Cf. A024063 (6^n-n).
%K A058829 nonn,hard,more
%O A058829 1,2
%A A058829 _Robert G. Wilson v_, Jan 04 2001
%E A058829 a(6) from _Vincenzo Librandi_, Sep 29 2012
%E A058829 a(7) from _Giovanni Resta_, Apr 07 2013
%E A058829 a(8) from _Robert Price_, Jan 21 2014
%E A058829 a(9) from _Ryan Propper_, Dec 11 2022