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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 121 |
| 3 | 721 |
| 4 | 115921 |
| 5 | 1254121 |
| 6 | 175667521 |
| 7 | 2723150641 |
| 8 | 328524651841 |
| 9 | 6553910658241 |
| 10 | 694593264839761 |
| 11 | 16751100559753561 |
| 12 | 1592929589394223081 |
| 13 | 44555491032952142881 |
| 14 | 3872288533662063462481 |
| 15 | 121957120480085202781681 |
| 16 | 9836937778718128127534881 |
| 17 | 341177468192261294809070401 |
[1,1,121,721,115921,1254121,175667521,2723150641, 328524651841,6553910658241,694593264839761, 16751100559753561,1592929589394223081, 44555491032952142881,3872288533662063462481, 121957120480085202781681, 9836937778718128127534881, 341177468192261294809070401] |