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A076190 Numbers n such that n!! + 2^5 is prime. 12

%I #24 Jul 22 2021 12:09:49

%S 5,7,9,11,15,21,33,41,43,45,67,93,117,327,363

%N Numbers n such that n!! + 2^5 is prime.

%C a(16) > 50000. - _Robert Price_, Jan 02 2015

%H The OpenPFGW Project, <a href="http://www.primeform.net/openpfgw/">Primality Tester</a>

%t lst={}; Do[If[PrimeQ[n!!+2^5], AppendTo[lst, n]], {n, 0,50000}]; lst

%t Select[Range[400],PrimeQ[#!!+32]&] (* _Harvey P. Dale_, Jul 22 2021 *)

%Y Cf. A006882, A080778 and A076185, A076186, A076188, A076189, A076193, A076194, A076195, A076196, A076197 for other values of s in n!! + 2^s.

%K nonn,more

%O 1,1

%A _Zak Seidov_, Nov 02 2002

%E Edited and checked (n<4096) by _Hugo Pfoertner_, Jun 19 2003

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Last modified May 27 16:21 EDT 2024. Contains 372880 sequences. (Running on oeis4.)