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%I #82 Sep 02 2017 19:28:44
%S 257,277,487,1267389841,50491808745015763381,
%T 1008407509171875041482378381,429215532868726286171043772444743140881,
%U 4551830726072842264843919206776501006328381
%N Primes of the form k!4+256, where k!4 is the quadruple factorial number (A007662).
%H Robert Price, <a href="/A289560/b289560.txt">Table of n, a(n) for n = 1..10</a>
%H Henri& Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n4+256&action=Search">PRP Records.Search for n!4+256.</a>
%H 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 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t Select[Table[MultiFactorial[i, 4] + 256, {i, 0, 100}], PrimeQ[#]&]
%Y Cf. A291349.
%K nonn
%O 1,1
%A _Robert Price_, Sep 02 2017
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