n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 52 |
5 | 476 |
6 | 5646 |
7 | 82368 |
8 | 1426888 |
9 | 28623376 |
10 | 652516090 |
11 | 16660233600 |
12 | 470930272572 |
13 | 14598765522368 |
14 | 492441140292934 |
15 | 17955574113204224 |
16 | 703714660937658128 |
17 | 29500170665998713088 |
18 | 1317136516654501334898 |
19 | 62399954043306802391040 |
[0,1,2,8,52,476,5646,82368,1426888,28623376, 652516090,16660233600,470930272572,14598765522368, 492441140292934,17955574113204224, 703714660937658128,29500170665998713088, 1317136516654501334898,62399954043306802391040] |