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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 58 |
| 4 | 422 |
| 5 | 2872 |
| 6 | 19772 |
| 7 | 142418 |
| 8 | 1096582 |
| 9 | 9040811 |
| 10 | 78452199 |
| 11 | 699839588 |
| 12 | 6297456806 |
| 13 | 56804155533 |
| 14 | 517737762700 |
| 15 | 4839960759976 |
| 16 | 46837953974511 |
[1,7,58,422,2872,19772,142418,1096582,9040811, 78452199,699839588,6297456806,56804155533, 517737762700,4839960759976,46837953974511] |