Summing The Following: $\ 1, 1+\frac{1}{2},1+\frac{1}{2}+\frac{1}{3}, 1+\frac{1}{2} +\frac{1}{3}+ \frac{1}{4}\ldots$

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I can't seem to get this to sum, I'd be very thankful if someone could help me out.

$$\ 1, 1+\frac{1}{2},1+\frac{1}{2}+\frac{1}{3}, 1+\frac{1}{2} +\frac{1}{3}+ \frac{1}{4}\ldots$$

NOTE It would be nice if someone would post a consistent 'algorithm' / method that always works for sequences of this form that can be summed. As I find them very interesting and they've come up a lot for me lately....