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A291687 Primes of the form k!4+4, where k!4 is the quadruple factorial number (A007662).

%I A291687 #5 Aug 31 2017 04:45:52
%S A291687 5,7,3469,9949,65839,1514209,5221129,40883539,151412629,44358635479,
%T A291687 16713607661375629,36453104912477522894629,
%U A291687 1027438963906784290227656915629,7419136758370889359733910587728129,4551830726072842264843919206776501006328129
%N A291687 Primes of the form k!4+4, where k!4 is the quadruple factorial number (A007662).
%H A291687 Robert Price, <a href="/A291687/b291687.txt">Table of n, a(n) for n = 1..18</a>
%H A291687 Henri& Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n4+4&amp;action=Search">PRP Records.Search for n!4+4.</a>
%H A291687 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 A291687 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A291687 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A291687 Select[Table[MultiFactorial[i, 4] + 4, {i, 0, 100}], PrimeQ[#]&]
%Y A291687 Cf. A291122.
%K A291687 nonn
%O A291687 1,1
%A A291687 _Robert Price_, Aug 29 2017