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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 561 |
| 3 | 10585 |
| 4 | 1729 |
| 5 | 488881 |
| 6 | 399001 |
| 7 | 2433601 |
| 8 | 1857241 |
| 9 | 6189121 |
| 10 | 549538081 |
| 11 | 50201089 |
| 12 | 14469841 |
| 13 | 86566959361 |
| 14 | 311963097601 |
| 15 | 369838909441 |
| 16 | 31929487861441 |
| 17 | 6389476833601 |
| 18 | 8493512837546881 |
| 19 | 31585234281457921 |
| 20 | 10120721237827201 |
| 21 | 289980482095624321 |
| 22 | 525025434548260801 |
| 23 | 91230634325542321 |
[9,561,10585,1729,488881,399001,2433601,1857241, 6189121,549538081,50201089,14469841,86566959361, 311963097601,369838909441,31929487861441, 6389476833601,8493512837546881,31585234281457921, 10120721237827201,289980482095624321, 525025434548260801,91230634325542321] |