A070747 - OEIS

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A070747

signum(sin(n)), where signum=A057427.

0, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, 1, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`a(n) <> 0 for n>0.`
	EXAMPLE	`n=10: sin(10) = sin(10-2pi) < 0, as pi < 10-2pi < 2*pi, therefore a(10) = signum(sin(10)) = -1.`
	CROSSREFS	`Cf. A000493, A000494, A070748, A070751, A070752.` `Sequence in context: A011596 A011597 * A070750 A011598 A011599 A011600` `Adjacent sequences: A070744 A070745 A070746 * A070748 A070749 A070750`
	KEYWORD	`sign,easy`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 04 2002`

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Last modified February 16 06:46 EST 2012. Contains 205867 sequences.