数组开始:
1, 1, 1, 1, 1, 1, 1,
1, 3, 7, 18, 47, 123, 322,
1, 11, 71, 539, 4271, 34276, 276119,
1, 41, 769, 17753, 434657, 10894561, 275770321,
1, 153, 8449, 603126, 46069729, 3625549353, 289625349454,
1, 571, 93127, 20721019, 4974089647, 1234496016491, 312007855309063,
...