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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 121 |
| 3 | 1690 |
| 4 | 25921 |
| 5 | 420250 |
| 6 | 7027801 |
| 7 | 119508490 |
| 8 | 2050368961 |
| 9 | 35341836010 |
| 10 | 610665665401 |
| 11 | 10564982353210 |
| 12 | 182902930753921 |
| 13 | 3167536046903290 |
| 14 | 54865571909148121 |
| 15 | 950426408617182250 |
| 16 | 16464857882672822401 |
| 17 | 285238628280432626890 |
| 18 | 4941562979309619843961 |
[1,10,121,1690,25921,420250,7027801,119508490, 2050368961,35341836010,610665665401, 10564982353210,182902930753921,3167536046903290, 54865571909148121,950426408617182250, 16464857882672822401,285238628280432626890, 4941562979309619843961] |