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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 87 |
| 4 | 844 |
| 5 | 9599 |
| 6 | 125545 |
| 7 | 1854234 |
| 8 | 30407763 |
| 9 | 546409567 |
| 10 | 10654642428 |
| 11 | 223763443039 |
| 12 | 5030118977041 |
| 13 | 120393730088818 |
| 14 | 3054106291046267 |
| 15 | 81792080931311015 |
| 16 | 2304639285452820684 |
| 17 | 68117438479292896255 |
[1,2,11,87,844,9599,125545,1854234,30407763, 546409567,10654642428,223763443039,5030118977041, 120393730088818,3054106291046267, 81792080931311015,2304639285452820684, 68117438479292896255] |