\[\sum_{k=1}^{n-1} H_{k}H_{n-k} \equiv 2\sum_{k=1}^{n-1} H_{k}\frac{n-k}{k+1}\]

Try to prove it! If you want to know how I proved it, get this thread to hit **20 replies** saying "Asuka best grill :^)" and the question mark will go away ;)

(\(H_{n} = \frac{1}{1}+\frac{1}{2}+\ldots+\frac{1}{n}\))

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## Comments

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TopNewestThe only question mark in your note is in the title.

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Rei best grill

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What shit taste ;c

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Likewise my friend

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