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| n | a(n) |
|---|---|
| 13 | 1 |
| 14 | 17 |
| 15 | 187 |
| 16 | 1725 |
| 17 | 14770 |
| 18 | 123810 |
| 19 | 1049683 |
| 20 | 9201893 |
| 21 | 84765839 |
| 22 | 830632443 |
| 23 | 8737884632 |
| 24 | 99283914256 |
| 25 | 1222304625766 |
| 26 | 16308650537598 |
| 27 | 235329993989098 |
| 28 | 3658770788460622 |
| 29 | 61010416134839892 |
| 30 | 1085940325012439060 |
| 31 | 20537758641146194266 |
| 32 | 410995800089222969774 |
[1,17,187,1725,14770,123810,1049683,9201893, 84765839,830632443,8737884632,99283914256, 1222304625766,16308650537598,235329993989098, 3658770788460622,61010416134839892, 1085940325012439060,20537758641146194266, 410995800089222969774] |