n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 53 |
7 | 330 |
8 | 2693 |
9 | 11102 |
10 | 69305 |
11 | 2644692 |
12 | 26516225 |
13 | 373871842 |
14 | 6008465697 |
15 | 36424666024 |
16 | 78857797745 |
17 | 982718238964 |
18 | 23664095532881 |
19 | 2367392271527064 |
20 | 85249785870507185 |
21 | 6310851546689058754 |
[1,1,2,5,12,53,330,2693,11102,69305,2644692, 26516225,373871842,6008465697,36424666024, 78857797745,982718238964,23664095532881, 2367392271527064,85249785870507185, 6310851546689058754] |