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| n | a(n) |
|---|---|
| 1 | 641 |
| 2 | 828 |
| 3 | 1803 |
| 4 | 2890 |
| 5 | 8582 |
| 6 | 21748 |
| 7 | 40492 |
| 8 | 128431 |
| 9 | 339592 |
| 10 | 639794 |
| 11 | 2087597 |
| 12 | 5632271 |
| 13 | 10609658 |
| 14 | 35199882 |
| 15 | 96069006 |
| 16 | 180868454 |
| 17 | 605781397 |
| 18 | 1663988392 |
| 19 | 3131743910 |
| 20 | 10543905961 |
| 21 | 29063878897 |
| 22 | 54690404276 |
| 23 | 184648426284 |
| 24 | 509929622436 |
[641,828,1803,2890,8582,21748,40492,128431,339592, 639794,2087597,5632271,10609658,35199882,96069006, 180868454,605781397,1663988392,3131743910, 10543905961,29063878897,54690404276,184648426284, 509929622436] |