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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 270 |
| 3 | 8154 |
| 4 | 259209 |
| 5 | 8529921 |
| 6 | 287329140 |
| 7 | 9841383288 |
| 8 | 341309814858 |
| 9 | 11951985351834 |
| 10 | 421773730944084 |
| 11 | 14977884769617708 |
| 12 | 534677344017297858 |
| 13 | 19171218712802918706 |
| 14 | 689996917303356051792 |
| 15 | 24915114884708594195832 |
| 16 | 902230812743891520644937 |
| 17 | 32753980020160125318149649 |
[1,9,270,8154,259209,8529921,287329140,9841383288, 341309814858,11951985351834,421773730944084, 14977884769617708,534677344017297858, 19171218712802918706,689996917303356051792, 24915114884708594195832,902230812743891520644937, 32753980020160125318149649] |