[1,0,4,3,16,15,64,63,256,255,1024,1023,4096,4095,16384,16383,65536,65535,262144,262143,1048576,1048575,4194304,4194303,16777216,16777215,67108864,67108863,268435456,268435455,1073741824,1073741823,4294967296,4294967295]
