I went the other way. A years unit grows by 0.6 per year, which is compounded (assuming parity between consumption and growth)
Year 1: 1
Year 2: 1 X 1.6
Year 3: (1 X 1.6) X 1.6
Year 4: ((1 X 1.6) X 1.6) X 1.6...
Which comes in at
1
1.6
2.56
4.09
6.55
10.45
16.77 (This is a total of 43 units)
26.84