A164384 - OEIS

%I #3 Mar 30 2012 18:52:34

%S 1,9,15,25,27,33,39,49,55,57,63,69,75,85,93,99,105,123,133,135,145,

%T 147,153,159,169,175,177,187,189,195,207,219,225,235,237,247,253,259,

%U 265,267,273,279,289,303,309,327,333,343,345,355,363,369,375,385,393,405

%N Positive nonprimes of the form p-4 where p is prime.

%e a(1)=5 (prime)-4 =1 (positive nonprime). a(2)=13 (prime)-4 = 9 (positive nonprime).

%Y Cf. A000040, A141468, A023200.

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Aug 14 2009

%E Entries checked by _R. J. Mathar_, Aug 20 2009