id:A098798 - OEIS Search Results

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Sum(floor(n/k): 1<k<n and k not dividing n).

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0, 0, 1, 1, 4, 2, 8, 5, 10, 9, 17, 7, 23, 17, 21, 19, 34, 19, 40, 24, 38, 38, 52, 24, 56, 49, 55, 45, 73, 39, 81, 56, 75, 73, 83, 49, 104, 86, 94, 68, 118, 72, 126, 92, 104, 114, 140, 74, 144, 114, 139, 119, 165, 107, 159, 119, 163, 157, 189, 93, 201, 171, 169, 153, 200, 148 (list; graph; listen)

	OFFSET	`1,5`
	COMMENT	`a(n) = Sum(floor(n/k)signum(n mod k): 1<=k<=n) = Sum(A010766(n,k)(1-A051731(n,k)): 1<=k<=n).`
	CROSSREFS	`Cf. A006218, A024816, A049820.` `Sequence in context: A021879 A020806 A030210 this_sequence A131783 A094312 A143942` `Adjacent sequences: A098795 A098796 A098797 this_sequence A098799 A098800 A098801`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 05 2004`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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