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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 43 |
| 5 | 81271 |
| 6 | 3570505 |
| 7 | 7025726485 |
| 8 | 314435374639 |
| 9 | 639872336584027 |
| 10 | 60775577624897675065 |
| 11 | 2794429652350970000851 |
| 12 | 276858360603194024261113585 |
| 13 | 600808083611945729624598396925 |
| 14 | 28083738921571587634894783049047 |
| 15 | 61728002094732427074308383210511683 |
[1,43,81271,3570505,7025726485,314435374639, 639872336584027,60775577624897675065, 2794429652350970000851, 276858360603194024261113585, 600808083611945729624598396925, 28083738921571587634894783049047, 61728002094732427074308383210511683] |