n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 10 |
6 | 52 |
7 | 351 |
8 | 3714 |
9 | 63638 |
10 | 1912203 |
11 | 103882478 |
12 | 10338614868 |
13 | 1892863194064 |
14 | 639799762452639 |
15 | 400857034314325045 |
16 | 467526363203064793081 |
17 | 1019286659457016864347582 |
18 | 4170114225096278323394128049 |
19 | 32130213534058019378134295287305 |
[0,1,1,3,10,52,351,3714,63638,1912203,103882478, 10338614868,1892863194064,639799762452639, 400857034314325045,467526363203064793081, 1019286659457016864347582, 4170114225096278323394128049, 32130213534058019378134295287305] |