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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 22 |
| 3 | 120 |
| 4 | 126 |
| 5 | 300 |
| 6 | 2200 |
| 7 | 4000 |
| 8 | 50000 |
| 9 | 150000 |
| 10 | 202020 |
| 11 | 231000 |
| 12 | 240000 |
| 13 | 600000 |
| 14 | 1600000 |
| 15 | 2500000 |
| 16 | 7000000 |
| 17 | 12500000 |
| 18 | 14300000 |
| 19 | 40400000 |
| 20 | 44000000 |
| 21 | 80000000 |
| 22 | 101250000 |
| 23 | 102600000 |
| 24 | 108000000 |
| 25 | 112500000 |
| 26 | 120120120 |
| 27 | 126000000 |
| 28 | 131400000 |
| 29 | 144000000 |
| 30 | 180000000 |
| 31 | 225000000 |
| 32 | 300300300 |
| 33 | 312300000 |
[20,22,120,126,300,2200,4000,50000,150000,202020, 231000,240000,600000,1600000,2500000,7000000, 12500000,14300000,40400000,44000000,80000000, 101250000,102600000,108000000,112500000,120120120, 126000000,131400000,144000000,180000000,225000000, 300300300,312300000] |