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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 8 |
| 6 | 9 |
| 7 | 27 |
| 8 | 29 |
| 9 | 50 |
| 10 | 60 |
| 11 | 252 |
| 12 | 651 |
| 13 | 1617 |
| 14 | 7374 |
| 15 | 8051 |
| 16 | 11391 |
| 17 | 17328 |
| 18 | 32382 |
| 19 | 35433 |
[0,1,2,3,8,9,27,29,50,60,252,651,1617,7374,8051, 11391,17328,32382,35433] |