[1,3,2,5,7,4,6,12,15,8,9,14,27,31,16,10,21,30,58,
63,32,11,24,48,62,121,127,64,13,26,54,106,126,248,
255,128,17,29,57,116,227,254,503,511,256,18,38,61,
120,242,475,510,1014,1023,512,19,42,86,125,247,
496,978,1022,2037,2047,1024,20,45,96,192,253,502,
1006,1992,2046,4084,4095,2048]
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