n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 40 |
5 | 205 |
6 | 1176 |
7 | 7399 |
8 | 50576 |
9 | 372537 |
10 | 2936080 |
11 | 24617131 |
12 | 218521128 |
13 | 2045278261 |
14 | 20112821288 |
15 | 207162957135 |
16 | 2228888801056 |
17 | 24989309310961 |
18 | 291322555295904 |
19 | 3524580202643155 |
20 | 44176839081266360 |
21 | 572725044269255661 |
22 | 7668896804574138232 |
23 | 105920137923940473079 |
[0,1,2,9,40,205,1176,7399,50576,372537,2936080, 24617131,218521128,2045278261,20112821288, 207162957135,2228888801056,24989309310961, 291322555295904,3524580202643155, 44176839081266360,572725044269255661, 7668896804574138232,105920137923940473079] |