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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 30 |
| 4 | 38 |
| 5 | 201 |
| 6 | 242 |
| 7 | 689 |
| 8 | 1806 |
| 9 | 7175 |
| 10 | 10839 |
| 11 | 21474 |
| 12 | 64607 |
| 13 | 290563 |
| 14 | 290579 |
| 15 | 581260 |
| 16 | 872576 |
| 17 | 2617577 |
| 18 | 5238258 |
| 19 | 7858320 |
| 20 | 19886365 |
| 21 | 47140605 |
| 22 | 70713773 |
| 23 | 212133736 |
[2,5,30,38,201,242,689,1806,7175,10839,21474, 64607,290563,290579,581260,872576,2617577,5238258, 7858320,19886365,47140605,70713773,212133736] |