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Jul 1, 2018 at 12:15 comment added მამუკა ჯიბლაძე Nice!! It might be useful to mention the generating function:$$\sum_nf(n)t^{n-1}=\frac{\operatorname{Li}_2(t)}{1-t}-\frac{\log^2(1-t)}t$$
Jun 29, 2018 at 8:07 vote accept Mikhail Tikhomirov
Jun 29, 2018 at 0:06 history answered Alexey Ustinov CC BY-SA 4.0