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| n | a(n) |
|---|---|
| 1 | 47 |
| 2 | 280 |
| 3 | 1943 |
| 4 | 13458 |
| 5 | 117959 |
| 6 | 919000 |
| 7 | 7859324 |
| 8 | 70278737 |
| 9 | 631712523 |
| 10 | 5957662149 |
| 11 | 56046139223 |
[47,280,1943,13458,117959,919000,7859324,70278737, 631712523,5957662149,56046139223] |