[1,1,3,1,3,7,15,31,63,7,15,31,63,127,255,17,35,71, 143,287,575,1151,2303,4607,9215,1843,3687,1229, 2459,4919,9839,19679,39359,78719,157439,314879, 629759,1259519,2519039,5038079,10076159,20152319, 40304639]