n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 46 |
5 | 252 |
6 | 1642 |
7 | 12316 |
8 | 104730 |
9 | 995122 |
10 | 10450414 |
11 | 120192924 |
12 | 1502537932 |
13 | 20285580880 |
14 | 294156077364 |
15 | 4559608340968 |
16 | 75236088623548 |
17 | 1316668510772124 |
18 | 24358939966126900 |
19 | 475008770990906488 |
20 | 9737844963832507656 |
21 | 209366721066736679536 |
[1,1,3,10,46,252,1642,12316,104730,995122, 10450414,120192924,1502537932,20285580880, 294156077364,4559608340968,75236088623548, 1316668510772124,24358939966126900, 475008770990906488,9737844963832507656, 209366721066736679536] |