n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 79 |
6 | 358 |
7 | 1791 |
8 | 9854 |
9 | 58958 |
10 | 379716 |
11 | 2617320 |
12 | 19197327 |
13 | 149099827 |
14 | 1221390172 |
15 | 10515829901 |
16 | 94865603724 |
17 | 894302028718 |
18 | 8788782784778 |
19 | 89848652800152 |
20 | 953666248076772 |
21 | 10491219933196228 |
22 | 119429574273909421 |
23 | 1404835599743325765 |
24 | 17052591331677804136 |
[1,1,2,6,20,79,358,1791,9854,58958,379716,2617320, 19197327,149099827,1221390172,10515829901, 94865603724,894302028718,8788782784778, 89848652800152,953666248076772,10491219933196228, 119429574273909421,1404835599743325765, 17052591331677804136] |