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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 91 |
| 3 | 828 |
| 4 | 7534 |
| 5 | 68552 |
| 6 | 623756 |
| 7 | 5675568 |
| 8 | 51642104 |
| 9 | 469892512 |
| 10 | 4275561136 |
| 11 | 38903414208 |
| 12 | 353982925023 |
| 13 | 3220897542254 |
| 14 | 29307009588171 |
| 15 | 266665052127080 |
| 16 | 2426390512890816 |
| 17 | 22077774624328776 |
| 18 | 200886102122914612 |
[1,10,91,828,7534,68552,623756,5675568,51642104, 469892512,4275561136,38903414208,353982925023, 3220897542254,29307009588171,266665052127080, 2426390512890816,22077774624328776, 200886102122914612] |