A126564 a(n) = floor( sin(n)*cos(n) ).

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Offset: 0

Author

Rick L. Shepherd, Dec 27 2006

Keywords

• sign

Crossrefs

Cf. A000480, A000493, A126565.

Programs

PARI

a(n) = floor(sin(n)*cos(n))

Formula

a(n) = floor(sin(n)*cos(n)).

a(n) = floor(sin(2n)/2). [Wesley Ivan Hurt, Jun 22 2013]