n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 60 |
6 | 259 |
7 | 1273 |
8 | 7048 |
9 | 43241 |
10 | 289685 |
11 | 2097912 |
12 | 16317134 |
13 | 135574160 |
14 | 1196898329 |
15 | 11168544771 |
16 | 109647222799 |
17 | 1128440311914 |
18 | 12139734936953 |
19 | 136195813530558 |
20 | 1590028534430967 |
21 | 19277087785530470 |
22 | 242235954813757132 |
23 | 3149491477171141810 |
[1,1,2,5,16,60,259,1273,7048,43241,289685,2097912, 16317134,135574160,1196898329,11168544771, 109647222799,1128440311914,12139734936953, 136195813530558,1590028534430967, 19277087785530470,242235954813757132, 3149491477171141810] |