| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 18 |
| 2 | 162 |
| 3 | 729 |
| 4 | 65610 |
| 5 | 59049 |
| 6 | 7440174 |
| 7 | 4782969 |
| 8 | 430467210 |
| 9 | 387420489 |
| 10 | 76709256822 |
| 11 | 31381059609 |
| 12 | 257010878197710 |
| 13 | 2541865828329 |
| 14 | 45753584909922 |
| 15 | 205891132094649 |
| 16 | 315013432104812970 |
| 17 | 16677181699666569 |
[1,18,162,729,65610,59049,7440174,4782969, 430467210,387420489,76709256822,31381059609, 257010878197710,2541865828329,45753584909922, 205891132094649,315013432104812970, 16677181699666569] |