id:A076899 - OEIS Search Results

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Let u(1)=u(2)=u(3)=1, u(n)=sign(u(n-1)-u(n-2))/(u(n-3)+1); then a(n) is the denominator of u(n).

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1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 3, 3, 1, 2, 2, 1, 5, 5, 1, 3, 3, 1, 8, 8, 1, 5, 5, 1, 13, 13, 1, 8, 8, 1, 21, 21, 1, 13, 13, 1, 34, 34, 1, 21, 21, 1, 55, 55, 1, 34, 34, 1, 89, 89, 1, 55, 55, 1, 144, 144, 1, 89, 89, 1, 233, 233, 1, 144, 144, 1, 377, 377, 1, 233, 233, 1, 610, 610, 1, 377 (list; graph; listen)

	OFFSET	`1,5`
	FORMULA	`F(k) denotes the k-th Fibonacci number: a(6k)=F(k+2); a(6k+1)=1; a(6k+2)=a(6k+3)=F(k+1); a(6k+4)=1; a(6k+5)=F(k+3)`
	CROSSREFS	`Sequence in context: A073741 A071838 A099245 this_sequence A096601 A078077 A078082` `Adjacent sequences: A076896 A076897 A076898 this_sequence A076900 A076901 A076902`
	KEYWORD	`frac,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 26 2002`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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