n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 53 |
6 | 217 |
7 | 1014 |
8 | 5335 |
9 | 31240 |
10 | 201608 |
11 | 1422074 |
12 | 10886503 |
13 | 89903100 |
14 | 796713190 |
15 | 7541889195 |
16 | 75955177642 |
17 | 810925547354 |
18 | 9148832109645 |
19 | 108759758865725 |
20 | 1358836180945243 |
21 | 17801039909762186 |
22 | 243992799075850037 |
23 | 3492329741309417600 |
24 | 52105418376516869150 |
25 | 809029109658971635142 |
[1,1,2,5,15,53,217,1014,5335,31240,201608,1422074, 10886503,89903100,796713190,7541889195, 75955177642,810925547354,9148832109645, 108759758865725,1358836180945243, 17801039909762186,243992799075850037, 3492329741309417600,52105418376516869150, 809029109658971635142] |