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A178924 Sum_{k>0} (n mod k) * 2^(n-k). 0
0, 1, 2, 5, 6, 23, 16, 89, 106, 267, 364, 1741, 526, 5135, 9360, 17681, 16914, 99347, 71188, 404501, 372758, 892951, 1763352, 7720985, 2809882, 17154075, 34201628, 82821149, 83623966, 435683359, 189300768, 1452343329, 1695678498, 4418961443, 8835694628 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..34.

MAPLE

a:= n-> add ((n mod k) * 2^(n-k), k=1..n-1) + n:

seq (a(n), n=0..40);

MATHEMATICA

Table[Sum[Mod[n, k] 2^(n-k), {k, 1, Infinity}], {n, 0, 100}]

CROSSREFS

Sequence in context: A014454 A136324 A128367 * A250546 A137067 A214200

Adjacent sequences:  A178921 A178922 A178923 * A178925 A178926 A178927

KEYWORD

nonn

AUTHOR

Vladimir Reshetnikov, Dec 29 2010

EXTENSIONS

Edited by Alois P. Heinz, Dec 29 2010

STATUS

approved

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Last modified December 21 19:36 EST 2014. Contains 252325 sequences.