fret positioning

fret #       divisor
1            0.056126
2            0.109101
3            0.159104
4            0.206291
5            0.250847
6            0.292893
7            0.33258
8            0.370039
9            0.405396
10           0.438769
11           0.470268
12           0.5
13           0.528063
14           0.554551
15           0.579552
16           0.60315
17           0.625423
18           0.646447
19           0.66629
20           0.68502
21           0.702698
22           0.719385
23           0.735134
24           0.75