[1,1,1,3,6,20,55,223,761,3595,14532,77818,361605, 2155525,11274781,73822175,428004750,3046519516, 19348533739,148493347507,1023481273549, 8412534272415,62450994058052,546699337652602, 4343869829492281,40308548641909593, 340994681344324137]