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A289854 Primes of the form k!2-64, where k!2 is the double factorial number (A006852). 1

%I #4 Jul 13 2017 21:28:43

%S 41,881,10331,34459361,13749310511,213458046676811,6190283353629311,

%T 319830986772877770815561,563862029680583509947946811,

%U 25373791335626257947657609311,488960130368663401543922783473071784646213671811

%N Primes of the form k!2-64, where k!2 is the double factorial number (A006852).

%H Robert Price, <a href="/A289854/b289854.txt">Table of n, a(n) for n = 1..13</a>

%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2-64&amp;action=Search">PRP Records.Search for n!2-64.</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] - 64, {i, 7, 100}], PrimeQ[#]&]

%Y Cf. A259045.

%K nonn

%O 1,1

%A _Robert Price_, Jul 13 2017

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)