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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 8 |
| 3 | 8 |
| 4 | 13 |
| 5 | 62 |
| 6 | 108 |
| 7 | 353 |
| 8 | 982 |
| 9 | 2362 |
| 10 | 6902 |
| 11 | 17966 |
| 12 | 48328 |
| 13 | 131033 |
| 14 | 349168 |
| 15 | 943670 |
| 16 | 2530452 |
| 17 | 6802772 |
| 18 | 18299554 |
| 19 | 49143209 |
| 20 | 132162126 |
| 21 | 355171176 |
| 22 | 954616216 |
| 23 | 2566141784 |
| 24 | 6896886200 |
| 25 | 18538660531 |
| 26 | 49829019816 |
| 27 | 133932941742 |
| 28 | 359997398044 |
[3,8,8,13,62,108,353,982,2362,6902,17966,48328, 131033,349168,943670,2530452,6802772,18299554, 49143209,132162126,355171176,954616216,2566141784, 6896886200,18538660531,49829019816,133932941742, 359997398044] |