id:A098971 - OEIS Search Results

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a(0)=1; for n > 0, a(n)=a(floor(n/2))+2*a(floor(n/4)).

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1, 3, 5, 5, 11, 11, 11, 11, 21, 21, 21, 21, 21, 21, 21, 21, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 171, 171, 171, 171, 171 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`n>0, a(n)=(1/3)(82^(floor(log(n)/log(2)))+(-1)^(floor(log(n)/log(2))))`
	PROGRAM	`(PARI) a(n)=if(n<1, 1, (1/3)(82^(floor(log(n)/log(2)))+(-1)^(floor(log(n)/log(2)))))`
	CROSSREFS	`a(2^n) gives the Jacobsthal sequence A001045(n+3).` `Cf. A001045, A007731.` `Sequence in context: A076877 A120841 A049757 this_sequence A093572 A118132 A089167` `Adjacent sequences: A098968 A098969 A098970 this_sequence A098972 A098973 A098974`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 23 2004`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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