[1,21,124,636,2749,11265,44028,168673,636526, 2385703,8903294,33177968,123602040,460821006, 1720240295,6432225711,24095079682,90435264009, 340097165156,1281506663877,4838093967400, 18299480354681,69340086808691,263195643048634]