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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 8 |
| 8 | 44 |
| 9 | 135 |
| 10 | 141 |
| 11 | 157 |
| 12 | 242 |
| 13 | 922 |
| 14 | 1234 |
| 15 | 2195 |
| 16 | 4649 |
| 17 | 6118 |
| 18 | 7323 |
| 19 | 9542 |
| 20 | 13493 |
| 21 | 20309 |
| 22 | 20359 |
| 23 | 232919 |
| 24 | 830864 |
| 25 | 902707 |
[0,1,2,3,4,7,8,44,135,141,157,242,922,1234,2195, 4649,6118,7323,9542,13493,20309,20359,232919, 830864,902707] |