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A181923 Nonprimes (A018252) mod 2. 0

%I

%S 1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,0,1,0,1,0,0,1,0,0,0,1,0,0,1,

%T 0,1,0,0,1,0,1,0,0,0,1,0,1,0,0,1,0,0,0,1,0,1,0,0,1,0,0,1,0,1,0,0,1,0,

%U 1,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,1,0,0,1,0,1,0,0,0,1,0,1,0,1,0,1,0,0,0,1,0,1,0,0

%N Nonprimes (A018252) mod 2.

%t With[{nn=200},Mod[#,2]&/@Complement[Range[nn],Prime[Range[ PrimePi[ nn]]]]] (* _Harvey P. Dale_, Apr 30 2014 *)

%K nonn

%O 1

%A _N. J. A. Sloane_, Apr 02 2012

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Last modified April 6 16:14 EDT 2020. Contains 333276 sequences. (Running on oeis4.)