I computed the first few values which were $1, -2, -4, -4, -16, -16, -64, -104, -240$. Is there a simple expression for this?
What's the Dirichlet inverse of $f(n) = 2^{n - 1}$?
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combinatorics
number-theory
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0OEIS says no ${}$ – 2017-01-02
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0How did you compute the -for instance - first four or five values? I couldn't decode the wikipedia-entry... *(perhaps you could include such examples in your question giving redundance for the casual reader)* – 2017-01-02