A098971 - OEIS

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A098971

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

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	OFFSET	`0,2`
	FORMULA	`n>0, a(n)=(1/3)(82^(floor(log(n)/log(2)))+(-1)^(floor(log(n)/log(2))))`
	PROG	`(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: A190864 A155537 A164663 * A093572 A118132 A089167` `Adjacent sequences: A098968 A098969 A098970 * A098972 A098973 A098974`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 23 2004`

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Last modified February 14 02:58 EST 2012. Contains 205567 sequences.