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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 57 |
| 3 | 989 |
| 4 | 22833 |
| 5 | 658805 |
| 6 | 22810857 |
| 7 | 921455309 |
| 8 | 42540129633 |
| 9 | 2209407621605 |
| 10 | 127500056700057 |
| 11 | 8093522778736829 |
| 12 | 560471288461196433 |
| 13 | 42046635718027122005 |
| 14 | 3396986478841654717257 |
| 15 | 294048932819502579461549 |
| 16 | 27150267978072875530135233 |
| 17 | 2663529874012507049631576005 |
[1,5,57,989,22833,658805,22810857,921455309, 42540129633,2209407621605,127500056700057, 8093522778736829,560471288461196433, 42046635718027122005,3396986478841654717257, 294048932819502579461549, 27150267978072875530135233, 2663529874012507049631576005] |