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A288409 Primes of the form k!2+64, where k!2 is the double factorial number (A006852).

%I A288409 #7 Feb 07 2019 14:58:07
%S A288409 67,79,1009,10459,34459489,654729139,316234143289,
%T A288409 2980227913743310874726229193921939
%N A288409 Primes of the form k!2+64, where k!2 is the double factorial number (A006852).
%C A288409 The next term has 211 digits. - _Harvey P. Dale_, Feb 07 2019
%H A288409 Robert Price, <a href="/A288409/b288409.txt">Table of n, a(n) for n = 1..8</a>
%H A288409 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 A288409 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 A288409 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A288409 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A288409 Select[Table[MultiFactorial[i, 2] + 64, {i, 0, 100}], PrimeQ[#]&]
%t A288409 Select[Range[100]!!+64,PrimeQ] (* _Harvey P. Dale_, Feb 07 2019 *)
%Y A288409 Cf. A076193.
%K A288409 nonn
%O A288409 1,1
%A A288409 _Robert Price_, Jun 08 2017