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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 272 |
| 3 | 4869 |
| 4 | 207116 |
| 5 | 8450612 |
| 6 | 354399907 |
| 7 | 14920072888 |
| 8 | 629855730272 |
| 9 | 26612973830635 |
| 10 | 1124925665450222 |
| 11 | 47558289000359748 |
| 12 | 2010749398071334458 |
| 13 | 85016252420605992721 |
| 14 | 3594603941362352310918 |
| 15 | 151985523215867315907352 |
[1,272,4869,207116,8450612,354399907,14920072888, 629855730272,26612973830635,1124925665450222, 47558289000359748,2010749398071334458, 85016252420605992721,3594603941362352310918, 151985523215867315907352] |