n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 73 |
5 | 386 |
6 | 2671 |
7 | 20728 |
8 | 175393 |
9 | 1553968 |
10 | 15520861 |
11 | 165541806 |
12 | 1869485773 |
13 | 22249874518 |
14 | 284029764383 |
15 | 3804116563276 |
16 | 53328350650081 |
17 | 782331158754088 |
18 | 12051288543702313 |
19 | 193028133988081918 |
20 | 3212490296905001781 |
21 | 55543932173668760221 |
[1,1,3,13,73,386,2671,20728,175393,1553968, 15520861,165541806,1869485773,22249874518, 284029764383,3804116563276,53328350650081, 782331158754088,12051288543702313, 193028133988081918,3212490296905001781, 55543932173668760221] |