n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 17 |
5 | 91 |
6 | 574 |
7 | 4173 |
8 | 34353 |
9 | 316012 |
10 | 3214181 |
11 | 35832567 |
12 | 434643518 |
13 | 5700340569 |
14 | 80391481045 |
15 | 1213353891124 |
16 | 19516682949217 |
17 | 333307249446083 |
18 | 6023617863581806 |
19 | 114854054775272053 |
20 | 2304312940318519977 |
[1,1,4,17,91,574,4173,34353,316012,3214181, 35832567,434643518,5700340569,80391481045, 1213353891124,19516682949217,333307249446083, 6023617863581806,114854054775272053, 2304312940318519977] |