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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 46 |
| 6 | 165 |
| 7 | 650 |
| 8 | 2742 |
| 9 | 12195 |
| 10 | 56388 |
| 11 | 267382 |
| 12 | 1291017 |
| 13 | 6304776 |
| 14 | 31043333 |
| 15 | 153739806 |
| 16 | 764663187 |
| 17 | 3817811679 |
| 18 | 19117378411 |
| 19 | 96034890298 |
| 20 | 483633087406 |
| 21 | 2442935438558 |
| 22 | 12369440072730 |
| 23 | 62816259353597 |
| 24 | 319763315261222 |
| 25 | 1632483727134416 |
| 26 | 8354058837330795 |
[1,1,2,5,14,46,165,650,2742,12195,56388,267382, 1291017,6304776,31043333,153739806,764663187, 3817811679,19117378411,96034890298,483633087406, 2442935438558,12369440072730,62816259353597, 319763315261222,1632483727134416,8354058837330795] |