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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 39 |
| 4 | 183 |
| 5 | 868 |
| 6 | 4197 |
| 7 | 20444 |
| 8 | 100317 |
| 9 | 494358 |
| 10 | 2444531 |
| 11 | 12116607 |
| 12 | 60169249 |
| 13 | 299205662 |
| 14 | 1489478285 |
| 15 | 7421004919 |
| 16 | 36998103731 |
| 17 | 184554402390 |
| 18 | 920984156829 |
| 19 | 4597556967587 |
| 20 | 22957329604823 |
| 21 | 114660204573360 |
| 22 | 572774287555053 |
| 23 | 2861670392922102 |
| 24 | 14299128414676793 |
| 25 | 71456889590284654 |
| 26 | 357121243412106029 |
[1,2,9,39,183,868,4197,20444,100317,494358, 2444531,12116607,60169249,299205662,1489478285, 7421004919,36998103731,184554402390,920984156829, 4597556967587,22957329604823,114660204573360, 572774287555053,2861670392922102, 14299128414676793,71456889590284654, 357121243412106029] |