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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 13 |
| 6 | 229 |
| 7 | 242 |
| 8 | 309 |
| 9 | 957 |
| 10 | 1473 |
| 11 | 1494 |
| 12 | 3182 |
| 13 | 3727 |
| 14 | 4177 |
| 15 | 23210 |
| 16 | 25719 |
| 17 | 32835 |
| 18 | 36990 |
| 19 | 103958 |
| 20 | 789955 |
| 21 | 1038890 |
[0,1,2,3,13,229,242,309,957,1473,1494,3182,3727, 4177,23210,25719,32835,36990,103958,789955, 1038890] |