id:A082560 - OEIS Search Results

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a(1)=1, a(n)=2*a(n-1) if n is odd, or a(n)=a(n/2)+1 if n is even.

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1, 2, 4, 3, 6, 5, 10, 4, 8, 7, 14, 6, 12, 11, 22, 5, 10, 9, 18, 8, 16, 15, 30, 7, 14, 13, 26, 12, 24, 23, 46, 6, 12, 11, 22, 10, 20, 19, 38, 9, 18, 17, 34, 16, 32, 31, 62, 8, 16, 15, 30, 14, 28, 27, 54, 13, 26, 25, 50, 24, 48, 47, 94, 7, 14, 13, 26, 12, 24, 23, 46, 11, 22, 21, 42, 20 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`b(1)=1, b(n)=2*b(n/2) if n is even, or b(n)=b(n-1)+1 if n is odd produces the sequence of natural numbers.`
	FORMULA	`if n is in A010737 : a(n)=n-1`
	PROGRAM	`(PARI) a(n)=if(n<2, 1, if(n%2, 2*a(n-1), 1+a(n/2)))`
	CROSSREFS	`Sequence in context: A129767 A119618 A113321 this_sequence A127202 A034701 A091857` `Adjacent sequences: A082557 A082558 A082559 this_sequence A082561 A082562 A082563`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 04 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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