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| n | a(n) |
|---|---|
| 8 | 2 |
| 9 | 32 |
| 10 | 462 |
| 11 | 6644 |
| 12 | 98472 |
| 13 | 1523808 |
| 14 | 24744720 |
| 15 | 422335056 |
| 16 | 7575963254 |
| 17 | 142706934722 |
| 18 | 2819192544786 |
| 19 | 58323311592602 |
| 20 | 1261634626792744 |
| 21 | 28492765388656632 |
| 22 | 670804322638496378 |
| 23 | 16439609940896532018 |
| 24 | 418816100433422180196 |
| 25 | 11077009292500273732470 |
[2,32,462,6644,98472,1523808,24744720,422335056, 7575963254,142706934722,2819192544786, 58323311592602,1261634626792744,28492765388656632, 670804322638496378,16439609940896532018, 418816100433422180196,11077009292500273732470] |