n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 118 |
6 | 658 |
7 | 4078 |
8 | 27724 |
9 | 205134 |
10 | 1641534 |
11 | 14132390 |
12 | 130299584 |
13 | 1281352790 |
14 | 13391026730 |
15 | 148237230942 |
16 | 1733059331604 |
17 | 21341010960286 |
18 | 276120222880246 |
19 | 3745333514843734 |
20 | 53149568086851784 |
21 | 787599172764342822 |
22 | 12166057777073762082 |
[1,1,2,6,24,118,658,4078,27724,205134,1641534, 14132390,130299584,1281352790,13391026730, 148237230942,1733059331604,21341010960286, 276120222880246,3745333514843734, 53149568086851784,787599172764342822, 12166057777073762082] |