| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 22 |
| 4 | 343 |
| 5 | 4664 |
| 6 | 58985 |
| 7 | 713306 |
| 8 | 8367628 |
| 9 | 96021959 |
| 10 | 1083676380 |
| 11 | 12071331701 |
| 12 | 133058996022 |
| 13 | 1454046750343 |
| 14 | 15775035404664 |
| 15 | 170096033058985 |
| 16 | 1824417120713306 |
| 17 | 19478739108367627 |
| 18 | 207133070096021958 |
| 19 | 2194787491083676380 |
| 20 | 23182442812071331701 |
[0,0,1,22,343,4664,58985,713306,8367628,96021959, 1083676380,12071331701,133058996022,1454046750343, 15775035404664,170096033058985,1824417120713306, 19478739108367627,207133070096021958, 2194787491083676380,23182442812071331701] |