NOT Problem

[Kernelpanic]

First of all thanks for all the tips. I tried a few things today. I was able to reproduce the result with "-16", but there are still a few things that are unclear to me, for example, how Not(20) And Not(40) leads to the correct result: = 61

       1 1 1 1
    + 1 0 1 1
(1)1 0 0 0 0 = -16  (Hope it!)