[1,1,6,20,69,196,554,1368,3240,7110,14896,29624, 56755,104468,186484,322800,544590,896259,1443834, 2278640,3531647,5380064,8069672,11926928,17392983, 25042836,35637168,50152068,69853604,96344440, 131669538]