User blog comment:Andibad/123 ... attack!/@comment-3271569-20130225170003/@comment-3271569-20130225172458

Ok did the test again:
 * lv 4 = (((150 + 150 + 100) + 20.5%*4) + (0*33.3%) )*1 = 729
 * lv 5 = (((150 + 150 + 100) + 410 + 0 = 8

Convert
 * lv 4 = (((Basepower=400) + 20.5%*4) + (0*33.3%) )*1 = 729
 * lv 5 = (((Basepower=400) + 410 + 0 = 810

Splitup
 * Basepower
 * 20.5%*4
 * (0*33.3%)

There seem something wrong with the middle of your formule.