n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 14 |
4 | 78 |
5 | 508 |
6 | 3796 |
7 | 32048 |
8 | 301872 |
9 | 3139680 |
10 | 35746080 |
11 | 442258560 |
12 | 5909028480 |
13 | 84802072320 |
14 | 1301090515200 |
15 | 21253339699200 |
16 | 368281038182400 |
17 | 6747621163315200 |
18 | 130338926671564800 |
19 | 2647326900234240000 |
20 | 56404832240977920000 |
[1,3,14,78,508,3796,32048,301872,3139680,35746080, 442258560,5909028480,84802072320,1301090515200, 21253339699200,368281038182400,6747621163315200, 130338926671564800,2647326900234240000, 56404832240977920000] |