| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | 35 |
| 3 | 50 |
| 4 | 1680 |
| 5 | 2664 |
| 6 | 3350 |
| 7 | 4130 |
| 8 | 5000 |
| 9 | 166800 |
| 10 | 251664 |
| 11 | 333500 |
| 12 | 401330 |
| 13 | 500000 |
| 14 | 16668000 |
| 15 | 25016664 |
| 16 | 33335000 |
| 17 | 40013330 |
| 18 | 50000000 |
| 19 | 1666680000 |
| 20 | 2500166664 |
| 21 | 3333350000 |
| 22 | 4000133330 |
| 23 | 5000000000 |
| 24 | 166666800000 |
| 25 | 250001666664 |
| 26 | 333333500000 |
| 27 | 400001333330 |
| 28 | 500000000000 |
[18,35,50,1680,2664,3350,4130,5000,166800,251664, 333500,401330,500000,16668000,25016664,33335000, 40013330,50000000,1666680000,2500166664, 3333350000,4000133330,5000000000,166666800000, 250001666664,333333500000,400001333330, 500000000000] |