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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 11 |
| 3 | 21 |
| 4 | 61 |
| 5 | 241 |
| 6 | 1201 |
| 7 | 7201 |
| 8 | 50401 |
| 9 | 403201 |
| 10 | 36288001 |
| 11 | 362880001 |
| 12 | 3991680001 |
| 13 | 47900160001 |
| 14 | 622702080001 |
| 15 | 8717829120001 |
| 16 | 130767436800001 |
| 17 | 2092278988800001 |
| 18 | 35568742809600001 |
| 19 | 640237370572800001 |
[11,11,21,61,241,1201,7201,50401,403201,36288001, 362880001,3991680001,47900160001,622702080001, 8717829120001,130767436800001,2092278988800001, 35568742809600001,640237370572800001] |