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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 16 |
| 5 | 25 |
| 6 | 34 |
| 7 | 2989 |
| 8 | 5248 |
| 9 | 1209 |
| 10 | 5675 |
| 11 | 560593 |
| 12 | 893128 |
| 13 | 11148172711 |
| 14 | 109420087 |
| 15 | 349259195 |
| 16 | 83221185536 |
| 17 | 17347403755459 |
| 18 | 161769065751 |
| 19 | 26070191142124243 |
| 20 | 4137435748625 |
| 21 | 1745702310941533 |
| 22 | 1389851895548897 |
| 23 | 936428641553074799449741 |
| 24 | 748157499921069376 |
[1,16,25,34,2989,5248,1209,5675,560593,893128, 11148172711,109420087,349259195,83221185536, 17347403755459,161769065751,26070191142124243, 4137435748625,1745702310941533,1389851895548897, 936428641553074799449741,748157499921069376] |