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| n | a(n) |
|---|---|
| 1 | 17 |
| 2 | 61 |
| 3 | 213 |
| 4 | 705 |
| 5 | 2293 |
| 6 | 7235 |
| 7 | 22491 |
| 8 | 68737 |
| 9 | 207725 |
| 10 | 621607 |
| 11 | 1846229 |
| 12 | 5452449 |
| 13 | 16029207 |
| 14 | 46976949 |
| 15 | 137331695 |
| 16 | 400884837 |
| 17 | 1168925307 |
| 18 | 3406992747 |
| 19 | 9928127547 |
| 20 | 28937875373 |
| 21 | 84376984733 |
| 22 | 246182651755 |
| 23 | 718778819599 |
| 24 | 2100421491357 |
[17,61,213,705,2293,7235,22491,68737,207725, 621607,1846229,5452449,16029207,46976949, 137331695,400884837,1168925307,3406992747, 9928127547,28937875373,84376984733,246182651755, 718778819599,2100421491357] |