id:A064690 - OEIS Search Results

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Define a sequence of fractions by x(m+1) = (x(m)^2+x(m)-1)/(x(m)+1) with x(1)=1; sequences gives values of n such that sgn(x(n))<>sgn(x(n-1)).

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2, 4, 7, 11, 13, 22, 23, 332, 560, 565, 566, 568, 3249, 3258, 3265, 3275, 3303, 3308, 3311, 3315, 3578, 3580, 3581, 3585, 3587, 3589, 3596, 3622, 3623, 3628, 3631, 4649, 4650, 4652, 4659, 4661, 4685, 4700, 4701, 5963, 5966, 5969, 6035, 6039, 6066, 6069 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`x(0)=1, x(1) = 1/2, x(2) = -1/6 so a(1) = 2 because sgn(x(1)) <> sgn(x(2))`
	CROSSREFS	`Sequence in context: A107791 A165288 A086795 this_sequence A138766 A054850 A167805` `Adjacent sequences: A064687 A064688 A064689 this_sequence A064691 A064692 A064693`
	KEYWORD	`nonn`
	AUTHOR	`Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Oct 16 2001`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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