n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 51 |
6 | 191 |
7 | 772 |
8 | 3320 |
9 | 15032 |
10 | 71084 |
11 | 348889 |
12 | 1768483 |
13 | 9220655 |
14 | 49286863 |
15 | 269346822 |
16 | 1501400222 |
17 | 8519796094 |
18 | 49133373040 |
19 | 287544553912 |
20 | 1705548000296 |
21 | 10241669069576 |
22 | 62201517142632 |
23 | 381749896129920 |
24 | 2365758616886432 |
25 | 14793705539872672 |
[1,1,2,5,15,51,191,772,3320,15032,71084,348889, 1768483,9220655,49286863,269346822,1501400222, 8519796094,49133373040,287544553912,1705548000296, 10241669069576,62201517142632,381749896129920, 2365758616886432,14793705539872672] |