n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 13 |
5 | 41 |
6 | 226 |
7 | 1072 |
8 | 9374 |
9 | 60958 |
10 | 723916 |
11 | 5892536 |
12 | 86402812 |
13 | 837641884 |
14 | 14512333928 |
15 | 162925851376 |
16 | 3252104882056 |
17 | 41477207604872 |
18 | 937014810365584 |
19 | 13380460644770848 |
20 | 337457467862898896 |
21 | 5333575373478669136 |
22 | 148532521250931168352 |
[1,2,4,13,41,226,1072,9374,60958,723916,5892536, 86402812,837641884,14512333928,162925851376, 3252104882056,41477207604872,937014810365584, 13380460644770848,337457467862898896, 5333575373478669136,148532521250931168352] |