A124230 - OEIS

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A124230

Denominator of g(n) defined by g(1)=1, g(2n)=1/g(n)+1, g(2n+1)=g(2n).

1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	FORMULA	`a(n)=F(ceil(log(n+1)/log(2))) where F=A000045`
	PROG	`(PARI) g(n)=if(n<2, 1, if(n%2, g(n-1), 1/g(n/2)+1)) //then// a(n)=denominator(g(n)) //or// a(n)=fibonacci(ceil(log(n+1)/log(2)))`
	CROSSREFS	`Cf. A020650, A124229.` `Sequence in context: A072749 A066490 A156685 * A090973 A076634 A083277` `Adjacent sequences: A124227 A124228 A124229 * A124231 A124232 A124233`
	KEYWORD	`frac,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 20 2006`

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Last modified February 16 19:23 EST 2012. Contains 205945 sequences.