[1,1,1,3,6,16,42,114,322,918,2673,7875,23457, 70551,213846,652794,2004864,6190612,19207416, 59850384,187217679,587689947,1850692506, 5845013538,18509607753,58759391013,186958014766, 596108115402,1904387243796,6095040222192, 19540540075824]