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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 19 |
| 3 | 20 |
| 4 | 779 |
| 5 | 799 |
| 6 | 15161 |
| 7 | 15960 |
| 8 | 621641 |
| 9 | 637601 |
| 10 | 12098459 |
| 11 | 12736060 |
| 12 | 496068739 |
| 13 | 508804799 |
| 14 | 9654555121 |
| 15 | 10163359920 |
| 16 | 395862232081 |
| 17 | 406025592001 |
| 18 | 7704322888099 |
| 19 | 8110348480100 |
| 20 | 315897565131899 |
| 21 | 324007913611999 |
| 22 | 6148040010147881 |
| 23 | 6472047923759880 |
[1,1,19,20,779,799,15161,15960,621641,637601, 12098459,12736060,496068739,508804799,9654555121, 10163359920,395862232081,406025592001, 7704322888099,8110348480100,315897565131899, 324007913611999,6148040010147881,6472047923759880] |