n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 46 |
5 | 334 |
6 | 2882 |
7 | 28604 |
8 | 320248 |
9 | 3993184 |
10 | 54942740 |
11 | 828086732 |
12 | 13586200504 |
13 | 241294019584 |
14 | 4615319816192 |
15 | 94629675177320 |
16 | 2070911506927360 |
17 | 48185049542009248 |
18 | 1187816429730925424 |
19 | 30923773410431125424 |
20 | 847808674826433774928 |
21 | 24414218135569507213312 |
[1,1,2,8,46,334,2882,28604,320248,3993184, 54942740,828086732,13586200504,241294019584, 4615319816192,94629675177320,2070911506927360, 48185049542009248,1187816429730925424, 30923773410431125424,847808674826433774928, 24414218135569507213312] |