[1,1,-2,4,-8,16,-32,64,-128,256,-512,1024,-2048, 4096,-8192,16384,-32768,65536,-131072,262144, -524288,1048576,-2097152,4194304,-8388608, 16777216,-33554432,67108864,-134217728,268435456, -536870912,1073741824,-2147483648]