n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 32 |
4 | 240 |
5 | 2232 |
6 | 24080 |
7 | 290048 |
8 | 3809088 |
9 | 53691840 |
10 | 803569184 |
11 | 12670027776 |
12 | 209244552192 |
13 | 3603569846912 |
14 | 64493380379520 |
15 | 1196207964360704 |
16 | 22942371004144640 |
17 | 454160262238341120 |
18 | 9265017815023565312 |
19 | 194524772488764702720 |
20 | 4198521645139971459072 |
[1,2,6,32,240,2232,24080,290048,3809088,53691840, 803569184,12670027776,209244552192,3603569846912, 64493380379520,1196207964360704,22942371004144640, 454160262238341120,9265017815023565312, 194524772488764702720,4198521645139971459072] |