id:A022819 - OEIS Search Results

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a(n) = [ 1/(n-1) + 2/(n-2) + 3/(n-3) + ... + (n-1)/1 ].

+0
3

0, 0, 1, 2, 4, 6, 8, 11, 13, 16, 19, 22, 25, 28, 31, 34, 38, 41, 44, 48, 51, 55, 59, 62, 66, 70, 74, 78, 81, 85, 89, 93, 97, 101, 106, 110, 114, 118, 122, 126, 131, 135, 139, 144, 148, 152, 157, 161, 166, 170, 174, 179, 183, 188, 193, 197, 202, 206, 211, 216 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n) = [Sum n/i, i = 2..n] = [A000027(n)*(A001008(n)/A002805(n)-1)] = [A006675(n)/A000142(n)] = [A001705(n-1)/A000142(n-1)]. - Henry Bottomley (se16(AT)btinternet.com), May 05 2001`
	EXAMPLE	`a(2)=[1/1]=1, a(3)=[1/2+2/1]=[5/2]=2, a(4)=[1/3+2/2+3/1]=[26/6]=4.`
	CROSSREFS	`Essentially the same as A081527.` `Adjacent sequences: A022816 A022817 A022818 this_sequence A022820 A022821 A022822` `Sequence in context: A051244 A054683 A022839 this_sequence A081527 A070978 A027919`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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