n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 20 |
6 | 104 |
7 | 775 |
8 | 6140 |
9 | 55427 |
10 | 553802 |
11 | 6087992 |
12 | 72994152 |
13 | 948103477 |
14 | 13262133736 |
15 | 198769630061 |
16 | 3177862894922 |
17 | 53984653965996 |
18 | 971068821144112 |
19 | 18438722595913195 |
20 | 368558842844143268 |
21 | 7735520783692157215 |
22 | 170095060428041137778 |
23 | 3910332719957508452016 |
24 | 93806427360751009531632 |
[1,0,1,2,20,104,775,6140,55427,553802,6087992, 72994152,948103477,13262133736,198769630061, 3177862894922,53984653965996,971068821144112, 18438722595913195,368558842844143268, 7735520783692157215,170095060428041137778, 3910332719957508452016,93806427360751009531632] |