[1,1,4,11,33,100,305,937,2890,8943,27741,86216, 268355,836297,2608818,8144875,25446229,79545148, 248780979,778400001,2436380402,7628211951, 23890103153,74836927720,234478937321,734802907841, 2303073316042]