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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 24 |
| 4 | 93 |
| 5 | 375 |
| 6 | 1568 |
| 7 | 6738 |
| 8 | 29524 |
| 9 | 131397 |
| 10 | 592474 |
| 11 | 2699383 |
| 12 | 12408001 |
| 13 | 57468088 |
| 14 | 267866657 |
| 15 | 1255563128 |
| 16 | 5913784441 |
| 17 | 27972890308 |
| 18 | 132815595779 |
| 19 | 632722358676 |
| 20 | 3023272574031 |
| 21 | 14484726323390 |
| 22 | 69565951887442 |
| 23 | 334840925316058 |
| 24 | 1614913283611508 |
| 25 | 7802839738638430 |
| 26 | 37764381640320588 |
| 27 | 183053879521094349 |
[1,2,7,24,93,375,1568,6738,29524,131397,592474, 2699383,12408001,57468088,267866657,1255563128, 5913784441,27972890308,132815595779,632722358676, 3023272574031,14484726323390,69565951887442, 334840925316058,1614913283611508,7802839738638430, 37764381640320588,183053879521094349] |