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 A100901 #9 Feb 19 2016 08:40:26 %S A100901 1,2,6,7,20,47,255,274,279,308,1162,2128,3791,9028,9629,10029,13202, %T A100901 38660,46631,48257 %N A100901 Numbers n such that (6^n-1)^2-2 is prime. %H A100901 S. Harvey, <a href="http://harvey563.tripod.com/Carol_Kynea.txt">Carol and Kynea Primes</a>. %o A100901 (PARI) is(n)=ispseudoprime((6^n-1)^2-2) \\ _Charles R Greathouse IV_, Feb 19 2016 %K A100901 nonn,more %O A100901 1,2 %A A100901 _Ray Chandler_, Nov 21 2004