n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 32 |
5 | 180 |
6 | 1219 |
7 | 9646 |
8 | 87192 |
9 | 886536 |
10 | 10016159 |
11 | 124481258 |
12 | 1687686528 |
13 | 24787991800 |
14 | 392081193504 |
15 | 6644677619581 |
16 | 120115898158288 |
17 | 2307044712629472 |
18 | 46917527736860976 |
19 | 1007152702625923440 |
20 | 22757886107313170356 |
21 | 539955309450787483261 |
22 | 13421068671117864869156 |
[1,1,2,7,32,180,1219,9646,87192,886536,10016159, 124481258,1687686528,24787991800,392081193504, 6644677619581,120115898158288,2307044712629472, 46917527736860976,1007152702625923440, 22757886107313170356,539955309450787483261, 13421068671117864869156] |