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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 241 |
| 3 | 9129 |
| 4 | 402321 |
| 5 | 19321689 |
| 6 | 981044401 |
| 7 | 51794295849 |
| 8 | 2814649754641 |
| 9 | 156399050208729 |
| 10 | 8845463571211521 |
| 11 | 507517525088436729 |
| 12 | 29468616564702121041 |
| 13 | 1728353228376135226329 |
| 14 | 102242911938342248555121 |
| 15 | 6093340217607472063134249 |
| 16 | 365501683327659682186607121 |
| 17 | 22049503920365906645420399769 |
[1,9,241,9129,402321,19321689,981044401, 51794295849,2814649754641,156399050208729, 8845463571211521,507517525088436729, 29468616564702121041,1728353228376135226329, 102242911938342248555121, 6093340217607472063134249, 365501683327659682186607121, 22049503920365906645420399769] |