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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 208 |
| 3 | 4113 |
| 4 | 70107 |
| 5 | 1174822 |
| 6 | 16721012 |
| 7 | 226886115 |
| 8 | 2823199343 |
| 9 | 33074332722 |
| 10 | 366468588411 |
| 11 | 3862531765288 |
| 12 | 38827887664460 |
| 13 | 374132975836928 |
| 14 | 3462018008021025 |
| 15 | 30769710869286232 |
| 16 | 262533007814160639 |
[15,208,4113,70107,1174822,16721012,226886115, 2823199343,33074332722,366468588411,3862531765288, 38827887664460,374132975836928,3462018008021025, 30769710869286232,262533007814160639] |