A013937 - OEIS

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A013937

Sum [n/k^3], k=1..n.

0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 75, 76, 77, 78, 79, 80, 81, 82 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`a(n) =a(n-1)+A061704(n)`
	EXAMPLE	`a(36)=[36/1]+[36/8]+[36/27]+[36/64]+...=36+4+1+0+...=41`
	CROSSREFS	`Cf. A005187, A006218, A011371, A013936, A013939 for similar.` `Sequence in context: A171524 A052421 A037477 * A118065 A020661 A068937` `Adjacent sequences: A013934 A013935 A013936 * A013938 A013939 A013940`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Henri Lifchitz (100637.64(AT)CompuServe.COM)`
	EXTENSIONS	`More terms from Henry Bottomley (se16(AT)btinternet.com), Jul 03 2001`

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Last modified February 16 16:45 EST 2012. Contains 205938 sequences.