n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 36 |
5 | 380 |
6 | 6390 |
7 | 157962 |
8 | 5396888 |
9 | 243179064 |
10 | 13938711210 |
11 | 987858368750 |
12 | 84613071940452 |
13 | 8597251494954564 |
14 | 1020353444641839854 |
15 | 139627532137612581090 |
16 | 21788453795572514675760 |
17 | 3840596246648027262079472 |
18 | 758435490711709577216754642 |
[1,1,2,6,36,380,6390,157962,5396888,243179064, 13938711210,987858368750,84613071940452, 8597251494954564,1020353444641839854, 139627532137612581090,21788453795572514675760, 3840596246648027262079472, 758435490711709577216754642] |