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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 2500 |
| 3 | 488601 |
| 4 | 103489929 |
| 5 | 22466712321 |
| 6 | 4919350997521 |
| 7 | 1080371161000000 |
| 8 | 237502965724417600 |
| 9 | 52227958295629168900 |
| 10 | 11486303574511411132081 |
| 11 | 2526218624607638969433649 |
| 12 | 555604441977129578423379025 |
[16,2500,488601,103489929,22466712321, 4919350997521,1080371161000000,237502965724417600, 52227958295629168900,11486303574511411132081, 2526218624607638969433649, 555604441977129578423379025] |