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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 29 |
| 3 | 159 |
| 4 | 1246 |
| 5 | 9884 |
| 6 | 73992 |
| 7 | 542353 |
| 8 | 4014514 |
| 9 | 30195535 |
| 10 | 229483051 |
| 11 | 1753032755 |
| 12 | 13435104833 |
| 13 | 103277494510 |
| 14 | 796249956004 |
| 15 | 6155156882177 |
| 16 | 47687937106356 |
| 17 | 370185895527595 |
| 18 | 2878540976279306 |
| 19 | 22417566580905998 |
| 20 | 174824418896006501 |
[8,29,159,1246,9884,73992,542353,4014514,30195535, 229483051,1753032755,13435104833,103277494510, 796249956004,6155156882177,47687937106356, 370185895527595,2878540976279306, 22417566580905998,174824418896006501] |