[0,1,4,9,20,42,85,171,343,687,1375,2751,5504, 11009,22019,44039,88080,176162,352325,704651, 1409303,2818607,5637215,11274431,22548863, 45097727,90195455,180390911,360781823,721563647, 1443127295,2886254591]