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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 8 |
| 6 | 9 |
| 7 | 19 |
| 8 | 58 |
| 9 | 121 |
| 10 | 187 |
| 11 | 806 |
| 12 | 855 |
| 13 | 1019 |
| 14 | 2593 |
| 15 | 2749 |
| 16 | 3016 |
| 17 | 4295 |
| 18 | 9664 |
| 19 | 14927 |
| 20 | 34562 |
| 21 | 64387 |
| 22 | 71299 |
| 23 | 71951 |
[0,1,2,3,8,9,19,58,121,187,806,855,1019,2593,2749, 3016,4295,9664,14927,34562,64387,71299,71951] |