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 A289550 #10 Dec 09 2020 16:08:49
%S A289550 2,3,23,401,8501,229631,623641
%N A289550 Primes of the form k!6-4, where k!6 is the sextuple factorial number (A085158).
%C A289550 The next term is too large to display.
%C A289550 The next term (a(8)) has 113 digits. - _Harvey P. Dale_, Dec 09 2020
%H A289550 Robert Price, <a href="/A289550/b289550.txt">Table of n, a(n) for n = 1..10</a>
%H A289550 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n6-4&action=Search">PRP Records.Search for n!6-4.</a>
%H A289550 Joe McLean, <a href="http://web.archive.org/web/20091027034731/http://uk.geocities.com/nassarawa%40btinternet.com/probprim2.htm">Interesting Sources of Probable Primes</a>
%H A289550 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A289550 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A289550 Select[Table[MultiFactorial[i, 6] - 4, {i, 4, 100}], PrimeQ[#]&]
%t A289550 Select[Table[Times@@Range[n,1,-6]-4,{n,3,100}],PrimeQ] (* _Harvey P. Dale_, Dec 09 2020 *)
%Y A289550 Cf. A289547.
%K A289550 nonn
%O A289550 1,1
%A A289550 _Robert Price_, Jul 07 2017