$1 ,\dfrac{1}{3},\dfrac{1}{6},\dfrac{1}{18},\dfrac{1}{36}$,. .............
$\dfrac{1}{108 }$
$\dfrac{1}{72 }$
$\dfrac{1}{144}$
$\dfrac{1}{48}$
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$1 ,\dfrac{1}{3},\dfrac{1}{6},\dfrac{1}{18},\dfrac{1}{36}$,. .............