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A178965 a(n) = numerator of sum(floor(n/k)/2^k, k=1..inf) 0

%I

%S 0,1,5,15,43,103,263,591,1391,3103,7007,15039,33983,72063,156543,

%T 334591,722687,1510911,3255807,6773759,14433279,30193663,63535103,

%U 131264511,278589439,575004671

%N a(n) = numerator of sum(floor(n/k)/2^k, k=1..inf)

%e a(3)=15 because sum(floor(3/k)/2^k, k=1..inf)=15/8

%t Table[Numerator[Sum[Floor[n/k]/2^k, {k, 1, Infinity}]], {n, 0, 25}]

%K nonn

%O 0,3

%A _Vladimir Reshetnikov_, Dec 31 2010

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Last modified May 25 01:17 EDT 2019. Contains 323534 sequences. (Running on oeis4.)