[seqfan] Reciprocal Recaman

[David Wilson]

Define the function f:Z->R as follows:

 

f(0) = 0

f(n) = f(n-1) - 1/n if >= 0, else f(n-1) + 1/n.

 

For which n do we have f(n-2) > f(n-1) > f(n)?