A065623 - OEIS

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A065623

floor(abs(cos(n)/cos(2n))).

1, 1, 0, 1, 4, 0, 1, 5, 0, 1, 2, 0, 1, 1, 0, 4, 1, 0, 5, 1, 0, 1, 1, 1, 0, 1, 3, 0, 1, 6, 0, 1, 2, 0, 1, 1, 0, 4, 1, 0, 6, 1, 0, 1, 1, 1, 0, 1, 3, 0, 1, 7, 0, 1, 2, 0, 1, 1, 0, 4, 1, 0, 7, 1, 0, 1, 1, 1, 0, 1, 3, 0, 1, 8, 0, 1, 2, 0, 1, 1, 0, 3, 1, 0, 9, 1, 0, 1, 1, 1, 0, 1, 2, 0, 1, 11, 0, 1, 2, 0, 1, 1, 0, 3 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	LINKS	`Harry J. Smith, Table of n, a(n) for n=0,...,1000`
	EXAMPLE	`a(10) = floor(abs(cos(10)/cos(20))) = floor(abs(-2.05613)) = floor(2.056) = 2`
	PROG	`(PARI) { for (n=0, 1000, a=floor(abs(cos(n)/cos(2*n))); write("b065623.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Oct 24 2009]`
	CROSSREFS	`A065624` `Sequence in context: A100045 A143844 A186759 * A178103 A147309 A147308` `Adjacent sequences: A065620 A065621 A065622 * A065624 A065625 A065626`
	KEYWORD	`nonn`
	AUTHOR	`Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Nov 07 2001`

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.