n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 52 |
5 | 464 |
6 | 5184 |
7 | 68928 |
8 | 1057584 |
9 | 18345536 |
10 | 354570112 |
11 | 7551674624 |
12 | 175700025728 |
13 | 4433961734656 |
14 | 120642462777344 |
15 | 3520972469815296 |
16 | 109731998026937088 |
17 | 3637456413350962176 |
18 | 127800512612435896320 |
[1,1,2,8,52,464,5184,68928,1057584,18345536, 354570112,7551674624,175700025728,4433961734656, 120642462777344,3520972469815296, 109731998026937088,3637456413350962176, 127800512612435896320] |