id:A069627 - OEIS Search Results

Search: id:A069627

Displaying 1-1 of 1 results found.

page 1

Sum_{k=1..n} floor(n*(n-1)/(2*k)).

+0
2

0, 0, 1, 5, 12, 22, 35, 53, 74, 101, 129, 162, 202, 244, 292, 344, 403, 463, 527, 601, 676, 762, 844, 937, 1035, 1138, 1245, 1355, 1476, 1597, 1726, 1862, 2002, 2149, 2300, 2454, 2621, 2784, 2957, 3136, 3323, 3515, 3707, 3914, 4119, 4338, 4551, 4782, 5012, 5250 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`The old entry with this sequence number was a duplicate of A072137.`
	MAPLE	`f:=n->add(floor( n(n-1)/(2k) ), k=1..n );`
	CROSSREFS	`Cf. A006218, A118014.` `Sequence in context: A022795 A025734 A153818 this_sequence A034971 A025740 A054307` `Adjacent sequences: A069624 A069625 A069626 this_sequence A069628 A069629 A069630`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Oct 28 2008`

page 1

Search completed in 0.002 seconds

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research