id:A098972 - OEIS Search Results

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a(0)=1; for n>0, a(n)=2*a(floor(n/2))+3*a(floor(n/3)).

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1, 5, 13, 25, 41, 41, 89, 89, 121, 157, 157, 157, 301, 301, 301, 301, 365, 365, 581, 581, 581, 581, 581, 581, 965, 965, 965, 1073, 1073, 1073, 1073, 1073, 1201, 1201, 1201, 1201, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 2065, 3025 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(n)>a(n-1) iff n is a 3-smooth number.`
	FORMULA	`sign(a(n+1)-a(n))=A065333(n+1)`
	PROGRAM	`(PARI) a(n)=if(n<1, 1, a(floor(n/2))2+3a(floor(n/3)))`
	CROSSREFS	`Cf. A003586, A007731.` `Sequence in context: A094553 A094079 A112558 this_sequence A081961 A096891 A001844` `Adjacent sequences: A098969 A098970 A098971 this_sequence A098973 A098974 A098975`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 23 2004`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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