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a(n) = [4*n*Pi] - 2*[2*n*Pi], where [ ]=floor.
4

%I #10 Apr 10 2021 02:00:38

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

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

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

%N a(n) = [4*n*Pi] - 2*[2*n*Pi], where [ ]=floor.

%t f[n_] := Floor[4 n*Pi] - 2*Floor[2 n*Pi];

%t t = Table[f[n], {n, 1, 220}] (* A191162 *)

%t Flatten[Position[t, 0]] (* A191214 *)

%t Flatten[Position[t, 1]] (* A191215 *)

%Y Cf. A191214, A191215.

%K nonn

%O 1

%A _Clark Kimberling_, May 27 2011