As long as we're at it, I became idly curious about the RAW multipliers for tanks to e-tanks. So here's a table using Anthony's formula, with a column to convert that to a multiplier. Pick your own nTank ranges for 1.2, 1.5, or other rounded values that you like.
Code:
Tanks eTanks Multiplier
1 1.03 1.03
2 2.11 1.05
3 3.25 1.08
4 4.46 1.12
5 5.75 1.15
6 7.13 1.19
7 8.62 1.23
8 10.22 1.28
9 11.96 1.33
10 13.86 1.39
11 15.97 1.45
12 18.33 1.53
13 21.00 1.62
14 24.08 1.72
15 27.73 1.85
16 32.19 2.01
17 37.94 2.23
18 46.05 2.56
19 59.91 3.15