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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 10 |
| 2 | 155 |
| 3 | 2100 |
| 4 | 26500 |
| 5 | 320000 |
| 6 | 3750000 |
| 7 | 43000000 |
| 8 | 485000000 |
| 9 | 5400000000 |
| 10 | 59500000000 |
| 11 | 650000000000 |
| 12 | 7050000000000 |
| 13 | 76000000000000 |
| 14 | 815000000000000 |
| 15 | 8700000000000000 |
| 16 | 92500000000000000 |
| 17 | 980000000000000000 |
| 18 | 10350000000000000000 |
| 19 | 109000000000000000000 |
[0,10,155,2100,26500,320000,3750000,43000000, 485000000,5400000000,59500000000,650000000000, 7050000000000,76000000000000,815000000000000, 8700000000000000,92500000000000000, 980000000000000000,10350000000000000000, 109000000000000000000] |