[0,1,3,8,18,42,94,208,450,966,2052,4330,9074, 18920,39266,81182,167268,343634,704122,1439496, 2936906,5981174,12161332,24691514,50066690, 101400616,205150098,414653998,837377988, 1689714242,3407154474,6865700808,13826659450, 27829885126]