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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 16 |
| 4 | 63 |
| 5 | 594 |
| 6 | 6388 |
| 7 | 88177 |
| 8 | 2078075 |
| 9 | 67448514 |
| 10 | 3011210310 |
| 11 | 200949643314 |
| 12 | 19152543505058 |
| 13 | 2587734793386622 |
| 14 | 506430044756068101 |
| 15 | 142259297693953559997 |
| 16 | 57178237320333047697665 |
[1,7,16,63,594,6388,88177,2078075,67448514, 3011210310,200949643314,19152543505058, 2587734793386622,506430044756068101, 142259297693953559997,57178237320333047697665] |