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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 85 |
| 4 | 1561 |
| 5 | 40501 |
| 6 | 1414351 |
| 7 | 63752137 |
| 8 | 3580066225 |
| 9 | 243666746281 |
| 10 | 19695440339191 |
| 11 | 1861672467512221 |
| 12 | 203222602188410377 |
| 13 | 25344097136222687005 |
| 14 | 3576607716683440603711 |
| 15 | 566387437351728771087121 |
| 16 | 99916441198022855099556961 |
| 17 | 19511402630734166295545687377 |
[1,1,7,85,1561,40501,1414351,63752137,3580066225, 243666746281,19695440339191,1861672467512221, 203222602188410377,25344097136222687005, 3576607716683440603711,566387437351728771087121, 99916441198022855099556961, 19511402630734166295545687377] |