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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 11 |
| 4 | 17 |
| 5 | 619 |
| 6 | 709 |
| 7 | 858437 |
| 8 | 54193 |
| 9 | 18639247 |
| 10 | 2197187 |
| 11 | 33152545703 |
| 12 | 1169890097 |
| 13 | 41657327595361 |
| 14 | 31722037141 |
| 15 | 6944870083473751 |
| 16 | 10192167279257 |
| 17 | 45494616421387671961 |
| 18 | 37539803774446801 |
| 19 | 249615310568664912892639 |
| 20 | 19065529984707154577 |
[1,1,1,11,17,619,709,858437,54193,18639247, 2197187,33152545703,1169890097,41657327595361, 31722037141,6944870083473751,10192167279257, 45494616421387671961,37539803774446801, 249615310568664912892639,19065529984707154577] |