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| n | a(n) |
|---|---|
| 15 | 1 |
| 16 | 279 |
| 17 | 19125 |
| 18 | 651245 |
| 19 | 14366695 |
| 20 | 233582056 |
| 21 | 3019039806 |
| 22 | 32552281146 |
| 23 | 302772441833 |
| 24 | 2489676658658 |
| 25 | 18436266612425 |
| 26 | 124754494349824 |
| 27 | 780244984225568 |
| 28 | 4553372454106529 |
| 29 | 24982642521157848 |
| 30 | 129722480362398371 |
| 31 | 640852528623371007 |
| 32 | 3026558205823169395 |
[1,279,19125,651245,14366695,233582056,3019039806, 32552281146,302772441833,2489676658658, 18436266612425,124754494349824,780244984225568, 4553372454106529,24982642521157848, 129722480362398371,640852528623371007, 3026558205823169395] |