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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 89 |
| 4 | 881 |
| 5 | 8721 |
| 6 | 86329 |
| 7 | 854569 |
| 8 | 8459361 |
| 9 | 83739041 |
| 10 | 828931049 |
| 11 | 8205571449 |
| 12 | 81226783441 |
| 13 | 804062262961 |
| 14 | 7959395846169 |
| 15 | 78789896198729 |
| 16 | 779939566141121 |
| 17 | 7720605765212481 |
| 18 | 76426118085983689 |
| 19 | 756540575094624409 |
| 20 | 7488979632860260401 |
| 21 | 74133255753507979601 |
| 22 | 733843577902219535609 |
[1,1,9,89,881,8721,86329,854569,8459361,83739041, 828931049,8205571449,81226783441,804062262961, 7959395846169,78789896198729,779939566141121, 7720605765212481,76426118085983689, 756540575094624409,7488979632860260401, 74133255753507979601,733843577902219535609] |