| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 10 |
| 4 | 125 |
| 5 | 61688 |
| 6 | 2126495 |
| 7 | 4874404106 |
| 8 | 306986431845 |
| 9 | 1919652428481928 |
| 10 | 2459993170305526730730 |
| 11 | 332043836975044402745021 |
| 12 | 1428874762393255348701231773647 |
| 13 | 57345183115624820200016928713263146 |
[0,1,10,125,61688,2126495,4874404106,306986431845, 1919652428481928,2459993170305526730730, 332043836975044402745021, 1428874762393255348701231773647, 57345183115624820200016928713263146] |