n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 16 |
3 | 110 |
4 | 770 |
5 | 5512 |
6 | 40066 |
7 | 294484 |
8 | 2182850 |
9 | 16288430 |
10 | 122198926 |
11 | 920820578 |
12 | 6964483628 |
13 | 52840433000 |
14 | 401990254180 |
15 | 3065365241440 |
16 | 23422905551018 |
17 | 179302895759782 |
18 | 1374785979255880 |
19 | 10556280995419090 |
20 | 81161958814162700 |
21 | 624750086745027388 |
[1,2,16,110,770,5512,40066,294484,2182850, 16288430,122198926,920820578,6964483628, 52840433000,401990254180,3065365241440, 23422905551018,179302895759782,1374785979255880, 10556280995419090,81161958814162700, 624750086745027388] |