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| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 73 |
| 10 | 1666 |
| 11 | 31241 |
| 12 | 486377 |
| 13 | 6638568 |
| 14 | 82413787 |
| 15 | 961757669 |
| 16 | 10756109317 |
| 17 | 116409307679 |
| 18 | 1228840258412 |
| 19 | 12766418662681 |
| 20 | 131564790987337 |
| 21 | 1352403410824806 |
| 22 | 13925656629847559 |
| 23 | 144227711099572501 |
| 24 | 1508401366805906552 |
| 25 | 15986784485974156076 |
| 26 | 172225656206792090516 |
[1,73,1666,31241,486377,6638568,82413787, 961757669,10756109317,116409307679,1228840258412, 12766418662681,131564790987337,1352403410824806, 13925656629847559,144227711099572501, 1508401366805906552,15986784485974156076, 172225656206792090516] |