A289852 - OEIS

%I #4 Jul 13 2017 21:28:26

%S 89,929,135119,34459409,7905853580609,

%T 669325572332691496707919692320662308340434243618803739488329723923351785805848442856791239207612629457179653299076271283992814866750698368061459208762618124485015869140609

%N Primes of the form k!2-16, where k!2 is the double factorial number (A006852).

%H Robert Price, <a href="/A289852/b289852.txt">Table of n, a(n) for n = 1..7</a>

%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2-16&amp;action=Search">PRP Records.Search for n!2-16.</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, 2] - 16, {i, 6, 100}], PrimeQ[#]&]

%Y Cf. A258616.

%K nonn

%O 1,1

%A _Robert Price_, Jul 13 2017