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A126564 Floor( sin(n)*cos(n) ). 1
0, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, -1, -1, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..102.

FORMULA

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

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

PROG

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

CROSSREFS

Cf. A000480, A000493, A126565.

Sequence in context: A117814 A062301 A181712 * A180433 A165560 A014306

Adjacent sequences:  A126561 A126562 A126563 * A126565 A126566 A126567

KEYWORD

sign

AUTHOR

Rick L. Shepherd, Dec 27 2006

STATUS

approved

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Last modified October 20 04:37 EDT 2018. Contains 316378 sequences. (Running on oeis4.)