Question Number 94339 by mathmax by abdo last updated on 18/May/20
$${calculate}\:\sum_{{n}=\mathrm{1}} ^{\infty} \:{H}_{{n}} {x}^{{n}} \:\:\:{with}\:{H}_{{n}} =\sum_{{k}=\mathrm{1}} ^{{n}} \:\frac{\mathrm{1}}{{k}} \\ $$
calculate-n-1-H-n-x-n-with-H-n-k-1-n-1-k-