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%I #6 Mar 17 2023 01:52:41
%S 10139,2026769,13749310319,213458046676619,191898783962510369,
%T 157952079428395476360490147277859119,
%U 29215606371473169285018060091249259296619,2395415678676082004163677716234578672981800778515369
%N Primes of the form k!2-256, where k!2 is the double factorial number (A006852).
%H Robert Price, <a href="/A289856/b289856.txt">Table of n, a(n) for n = 1..12</a>
%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2-256&action=Search">PRP Records.Search for n!2-256.</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, 2] - 256, {i, 8, 100}], PrimeQ[#]&]
%Y Cf. A006852, A265114.
%K nonn
%O 1,1
%A _Robert Price_, Jul 13 2017