[0,0,1,3,15,54,216,810,3105,11745,44631,169128, 641520,2431944,9221121,34959195,132543135, 502506990,1905156936,7222991778,27384465825, 103822372809,393620574951,1492328843280, 5657848431840,21450531825360]