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A289490 Primes of the form k!4+8, where k!4 is the quadruple factorial number (A007662). 1

%I #8 Sep 02 2017 19:27:39

%S 11,13,29,53,239,593,65843,1514213,5221133,4996616633,1729986783533,

%T 7579867420133,36453104912477522894633,2442358029135994033939883,

%U 173407420068655576409731133,534602198949923693866675351078133,7419136758370889359733910587728133

%N Primes of the form k!4+8, where k!4 is the quadruple factorial number (A007662).

%H Robert Price, <a href="/A289490/b289490.txt">Table of n, a(n) for n = 1..22</a>

%H Henri& Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n4+8&amp;action=Search">PRP Records.Search for n!4+8.</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] + 8, {i, 0, 100}], PrimeQ[#]&]

%Y Cf. A291343.

%K nonn

%O 1,1

%A _Robert Price_, Sep 02 2017

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Last modified April 23 14:32 EDT 2024. Contains 371914 sequences. (Running on oeis4.)