1, 1, 3, 7, 21, 73, 245, 793, 2815, 10075, 36727, 137411, 511099, 1902023, 7265539, 27944559, 107626613, 418427913, 1633245101, 6388652625, 25192946761, 99781420877, 395823365473, 1577503839685, 6310009049517, 25281085381601, 101614792870501, 409704814929945, 1654942675306197