id:A117672 - OEIS Search Results

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|cos(n)*cos(n+2)| < (cos(n+1))^2.

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	OFFSET	`0,1`
	COMMENT	`What is the density of the sequence? I am convinced that this sequence has the same density as A026313.`
	EXAMPLE	`\|cos(5)*cos(7)\| < (cos(6))^2, therefore 5 is in the sequence.`
	MATHEMATICA	`Select[Range[120], Abs[Cos[ # ]*Cos[ # + 2]] < Cos[ # + 1]^2 &]`
	CROSSREFS	`Cf. A026313 [same definition with sin instead of cos].` `Sequence in context: A045506 A007494 A052490 this_sequence A139364 A024913 A050172` `Adjacent sequences: A117669 A117670 A117671 this_sequence A117673 A117674 A117675`
	KEYWORD	`nonn`
	AUTHOR	`Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 12 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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