n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 5 |
5 | 19 |
6 | 66 |
7 | 293 |
8 | 1144 |
9 | 4308 |
10 | 17158 |
11 | 67007 |
12 | 258431 |
13 | 1012299 |
14 | 3955448 |
15 | 15396192 |
16 | 60225003 |
17 | 235693679 |
18 | 921621773 |
19 | 3610690891 |
20 | 14157362951 |
21 | 55517613242 |
22 | 217923561656 |
23 | 856025426013 |
24 | 3363897769426 |
25 | 13227528604439 |
[1,1,4,5,19,66,293,1144,4308,17158,67007,258431, 1012299,3955448,15396192,60225003,235693679, 921621773,3610690891,14157362951,55517613242, 217923561656,856025426013,3363897769426, 13227528604439] |