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A000480 a(n) = floor(cos(n)). 5

%I

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

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

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

%N a(n) = floor(cos(n)).

%p f := n->floor(evalf(cos(n)));

%t Table[Floor[Cos[n]], {n, 0, 100}]

%K sign,easy

%O 0,1

%A _N. J. A. Sloane_

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Last modified March 20 20:14 EDT 2019. Contains 321352 sequences. (Running on oeis4.)