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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 25 |
| 4 | 287 |
| 5 | 7601 |
| 6 | 116337 |
| 7 | 3740017 |
| 8 | 80014415 |
| 9 | 2949026857 |
| 10 | 133787267943 |
| 11 | 4200083163057 |
| 12 | 241983191914853 |
| 13 | 11120075525056265 |
| 14 | 530169345622378745 |
| 15 | 30835220884142971385 |
| 16 | 2029889748240816948527 |
| 17 | 141614089508017106620961 |
| 18 | 8967246922112275916862825 |
| 19 | 750640275823651591748840329 |
| 20 | 57132832447805992338691195027 |
[1,3,25,287,7601,116337,3740017,80014415, 2949026857,133787267943,4200083163057, 241983191914853,11120075525056265, 530169345622378745,30835220884142971385, 2029889748240816948527,141614089508017106620961, 8967246922112275916862825, 750640275823651591748840329, 57132832447805992338691195027] |