n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 36 |
4 | 231 |
5 | 1540 |
6 | 10440 |
7 | 71253 |
8 | 487578 |
9 | 3339820 |
10 | 22885995 |
11 | 156848616 |
12 | 1075018896 |
13 | 7368190921 |
14 | 50502074766 |
15 | 346145696820 |
16 | 2372516138895 |
17 | 16261462918828 |
18 | 111457712887128 |
19 | 763942497430365 |
20 | 5236139690949090 |
21 | 35889035134544956 |
22 | 245987105715037011 |
[0,1,6,36,231,1540,10440,71253,487578,3339820, 22885995,156848616,1075018896,7368190921, 50502074766,346145696820,2372516138895, 16261462918828,111457712887128,763942497430365, 5236139690949090,35889035134544956, 245987105715037011] |