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 A242176 #18 Sep 08 2022 08:46:08 %S A242176 1,2,91,185,387,488,747,800,9901,10115,12043,13118,30981,51496 %N A242176 Numbers k such that k*6^k + 1 is prime. %H A242176 G. Loeh, <a href="http://guenter.loeh.name/gc/status.html">Generalized Cullen primes</a> %t A242176 Select[Range[1500], PrimeQ[# 6^# + 1] &] %o A242176 (Magma) [n: n in [0..1500] | IsPrime(n*6^n+1)]; %o A242176 (PARI) is(n)=ispseudoprime(n*6^n+1) \\ _Charles R Greathouse IV_, Feb 17 2017 %Y A242176 Cf. numbers n such that n*k^n + 1 is prime: A005849 (k=2), A006552 (k=3), A007646 (k=4), this sequence (k=6), A242177 (k=7), A242178 (k=8), A007647 (k=10), A242196 (k=12), A242197 (k=14), A242198 (k=15), A242199 (k=16), A007648 (k=18). %K A242176 nonn,more %O A242176 1,2 %A A242176 _Vincenzo Librandi_, May 08 2014 %E A242176 a(9)-a(14) from Loeh's list (see Links) - _Bruno Berselli_, May 08 2014