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 A059675 #10 May 22 2017 11:43:48
%S A059675 1,2,3,19,20,24,34,77,107,114,122,165,530,1999,4359,11842,12059,13802,
%T A059675 22855,41679,58185,145359,249987
%N A059675 Numbers n such that n*6^n - 1 is prime.
%H A059675 Steven Harvey, <a href="http://harvey563.tripod.com/GeneralizedWoodallPrimes.txt">Generalized Woodall Search</a>
%t A059675 Do[ If[ PrimeQ[ n*6^n - 1 ], Print[ n ] ], {n, 1, 3500} ]
%o A059675 (PARI) is(n)=ispseudoprime(n*6^n-1) \\ _Charles R Greathouse IV_, May 22 2017
%K A059675 nonn
%O A059675 1,2
%A A059675 _Robert G. Wilson v_, Feb 05 2001
%E A059675 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
%E A059675 a(22)-a(23) from Harvey link by _Ray Chandler_, Apr 10 2016