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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 10 |
| 4 | 141 |
| 5 | 2548 |
| 6 | 56197 |
| 7 | 1463670 |
| 8 | 43966297 |
| 9 | 1496317768 |
| 10 | 56904041481 |
| 11 | 2391466059970 |
| 12 | 110064342800101 |
| 13 | 5505608606065020 |
| 14 | 297412929070311181 |
| 15 | 17255455494684113518 |
| 16 | 1070135653599485349297 |
| 17 | 70646208593060717167120 |
| 18 | 4946304737167849687047697 |
| 19 | 366097196759013937558696698 |
[0,1,10,141,2548,56197,1463670,43966297, 1496317768,56904041481,2391466059970, 110064342800101,5505608606065020, 297412929070311181,17255455494684113518, 1070135653599485349297,70646208593060717167120, 4946304737167849687047697, 366097196759013937558696698] |