[0,1,4,14,50,178,644,2347,8624,31908,118768, 444308,1669560,6298280,23842032,90531032, 344702646,1315726218,5033357852,19294463682, 74099098212,285056401796,1098314920968, 4237879802726,16373796107092,63341371265892, 245315823125496]