Hello, Is there a way to solve this problem easily ? I want to find the initial increment for a mathematical serie of n values. All series have to go from 0 to 1. With 3 values, for example, the initial increment is 0.3333333: First value = 0 + (0*0.333333) = 0 Second value = first value + (1*0.333333) = 0.33333333 Third value = second value + (2*0.3333333) = 1 With 4 values, the initial increment is 0.1666666: First value = 0 + (0*0.1666666) = 0 Second value = first value + (1*0.1666666) = 0.1666666 Third value = second value + (2*0.1666666) = 0.5 Fourth value = third value + (3*0.1666666) = 1 A big like for any answer helping to solve that problem without using brute force.

Hi Informatix, it looks like that to compute x (0.1666..) you should simply divide 1 by the series (n * n-1)/2 that is the one which gives you the sum of n natural numbers. Is that what are you after? udg

I know that feeling. Once I couldn't recall my own passwords for well over half a day...I was simply locked at staring my screen waiting for some enlightenment..