[1,0,3,3,6,12,27,63,153,381,969,2505,6564,17394, 46533,125505,340902,931716,2560401,7070337, 19609146,54597852,152556057,427642677,1202289669, 3389281245,9578183391,27130207503,77009455428, 219023318406,624069834627,1781228354487]