A076193 - OEIS

%I #22 Sep 16 2018 04:37:40

%S 3,5,9,11,17,19,23,51,219,421,2845,4691,10617

%N Numbers k such that k!! + 2^6 is prime.

%C a(14) > 50000. - _Robert Price_, Mar 22 2015

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

%t Select[Range[0, 1000], PrimeQ[#!! + 64] &] (* _Robert Price_, Mar 22 2015 *)

%Y Cf. A006882, A080778 and A076185, A076186, A076188, A076189, A076190, A076194, A076195, A076196, A076197 (other values of s in n!! + 2^s).

%K nonn,more

%O 1,1

%A _Zak Seidov_, Nov 02 2002

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

%E a(12)-a(13) from _Robert Price_, Jan 23 2013