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| n | a(n) |
|---|---|
| 1 | 5684 |
| 2 | 9256 |
| 3 | 17612 |
| 4 | 38056 |
| 5 | 90524 |
| 6 | 231736 |
| 7 | 629132 |
| 8 | 1793416 |
| 9 | 5328764 |
| 10 | 16413016 |
| 11 | 52195052 |
| 12 | 170891176 |
| 13 | 574845404 |
| 14 | 1983103096 |
| 15 | 7003319372 |
| 16 | 25265467336 |
| 17 | 92897360444 |
| 18 | 347253741976 |
| 19 | 1316323506092 |
| 20 | 5047850897896 |
| 21 | 19540336713884 |
[5684,9256,17612,38056,90524,231736,629132, 1793416,5328764,16413016,52195052,170891176, 574845404,1983103096,7003319372,25265467336, 92897360444,347253741976,1316323506092, 5047850897896,19540336713884] |