n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 85 |
6 | 382 |
7 | 2219 |
8 | 13624 |
9 | 100293 |
10 | 811914 |
11 | 7594015 |
12 | 74507490 |
13 | 862987151 |
14 | 10327793088 |
15 | 139175089681 |
16 | 1966790900028 |
17 | 30983071424315 |
18 | 496696984054286 |
19 | 8925920862110603 |
20 | 162253809011669330 |
21 | 3228438870635420315 |
22 | 65677024568975412036 |
23 | 1448358661756969370985 |
[1,1,2,6,20,85,382,2219,13624,100293,811914, 7594015,74507490,862987151,10327793088, 139175089681,1966790900028,30983071424315, 496696984054286,8925920862110603, 162253809011669330,3228438870635420315, 65677024568975412036,1448358661756969370985] |