n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 44 |
5 | 226 |
6 | 1241 |
7 | 7093 |
8 | 41666 |
9 | 250260 |
10 | 1529993 |
11 | 9488398 |
12 | 59545909 |
13 | 377451385 |
14 | 2413157855 |
15 | 15542535697 |
16 | 100753850132 |
17 | 656856027658 |
18 | 4303970039402 |
19 | 28328599504756 |
20 | 187214549485759 |
21 | 1241775795647609 |
22 | 8263989319451514 |
23 | 55163575187733922 |
[1,1,2,9,44,226,1241,7093,41666,250260,1529993, 9488398,59545909,377451385,2413157855,15542535697, 100753850132,656856027658,4303970039402, 28328599504756,187214549485759,1241775795647609, 8263989319451514,55163575187733922] |