n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 30 |
4 | 170 |
5 | 1050 |
6 | 6846 |
7 | 46374 |
8 | 323154 |
9 | 2301618 |
10 | 16680246 |
11 | 122607342 |
12 | 911868282 |
13 | 6849381194 |
14 | 51885977838 |
15 | 395941193718 |
16 | 3040818657954 |
17 | 23485437201762 |
18 | 182297207394150 |
19 | 1421357996034750 |
20 | 11126867651367498 |
21 | 87421958424703098 |
22 | 689130671539597854 |
[1,2,6,30,170,1050,6846,46374,323154,2301618, 16680246,122607342,911868282,6849381194, 51885977838,395941193718,3040818657954, 23485437201762,182297207394150,1421357996034750, 11126867651367498,87421958424703098, 689130671539597854] |