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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 865 |
| 3 | 14462 |
| 4 | 336653 |
| 5 | 8103241 |
| 6 | 183324631 |
| 7 | 4238895126 |
| 8 | 98184350818 |
| 9 | 2265008802005 |
| 10 | 52325664406022 |
| 11 | 1208931244861130 |
| 12 | 27923747107250179 |
| 13 | 645039373054891828 |
| 14 | 14900511436264593319 |
| 15 | 344198253865046283579 |
[21,865,14462,336653,8103241,183324631,4238895126, 98184350818,2265008802005,52325664406022, 1208931244861130,27923747107250179, 645039373054891828,14900511436264593319, 344198253865046283579] |