A076194 - OEIS

%I #19 Sep 16 2018 04:37:44

%S 3,7,17,19,31,43,51,163,215,269,297,457,599,633,795,999,1027,1261,

%T 2567,14315,39505,44725

%N Numbers k such that k!! + 2^7 is prime.

%C a(23) > 50000. - _Robert Price_, Mar 09 2015

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

%Y Cf. A006882, A080778 and A076185, A076186, A076188, A076189, A076190, A076193, 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 extended (n < 4096) by _Hugo Pfoertner_, Jun 19 2003

%E a(20) from _Robert Price_, Feb 04 2013

%E a(21)-a(22) from _Robert Price_, Mar 09 2015