[0,1,2,6,17,50,147,434,1282,3789,11200,33109, 97878,289354,855413,2528850,7476023,22101326, 65338038,193158521,571033600,1688143881, 4990651642,14753839486,43616704857,128943855250, 381196100507,1126928202714,3331532438042, 9848993360069]