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Question Number 71143 by mathmax by abdo last updated on 12/Oct/19
$${let}\:\:{A}_{{n}} =\sum_{{k}=\mathrm{0}} ^{{n}} \:\frac{\mathrm{1}}{\mathrm{3}{k}+\mathrm{1}}\:{calculate}\:{A}_{{n}} \:{interms}\:{H}_{{n}} =\sum_{{k}=\mathrm{1}} ^{{n}} \:\frac{\mathrm{1}}{{k}} \\ $$
Commented by mathmax by abdo last updated on 22/Oct/19
$${this}\:{question}\:{still}\:{insolved}\:{for}\:{a}\:{long}\:{time}...! \\ $$