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A072481 Sums of sums of remainders when dividing n by k, 0<k<=n. +0
1
0, 0, 1, 2, 6, 9, 17, 25, 37, 50, 72, 89, 117, 148, 184, 220, 271, 318, 382, 443, 513, 590, 688, 773, 876, 988, 1113, 1237, 1388, 1526, 1693, 1860, 2044, 2241, 2459, 2657, 2890, 3138, 3407, 3665, 3962, 4246, 4571, 4899, 5238, 5596, 5999, 6373, 6787, 7207 (list; graph; listen)
OFFSET

0,4

COMMENT

Partial sums of A004125;

a(n) = sum{sum{ k mod d | 1<=d<=k} | 1<=k<=n}.

CROSSREFS

Adjacent sequences: A072478 A072479 A072480 this_sequence A072482 A072483 A072484

Sequence in context: A049622 A043548 A054974 this_sequence A032471 A002886 A028724

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 02 2002

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.


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