The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 86 |
| 4 | 1106 |
| 5 | 19562 |
| 6 | 451014 |
| 7 | 13051586 |
| 8 | 460907034 |
| 9 | 19434738686 |
| 10 | 961628831658 |
| 11 | 55046140338642 |
| 12 | 3602414472002206 |
| 13 | 266842000568643866 |
| 14 | 22180625837341816898 |
| 15 | 2053584526860808500094 |
| 16 | 210393497508897167616290 |
| 17 | 23715128208081620773251530 |
[1,2,10,86,1106,19562,451014,13051586,460907034, 19434738686,961628831658,55046140338642, 3602414472002206,266842000568643866, 22180625837341816898,2053584526860808500094, 210393497508897167616290, 23715128208081620773251530] |