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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 66 |
| 4 | 1735 |
| 5 | 77587 |
| 6 | 5339632 |
| 7 | 527780778 |
| 8 | 71236904519 |
| 9 | 12635518401687 |
| 10 | 2857729962091681 |
| 11 | 804340796768258860 |
| 12 | 276170316701087964628 |
| 13 | 113757566198465278521124 |
| 14 | 55424247710747076665462268 |
| 15 | 31554099393732823158673973698 |
[1,1,5,66,1735,77587,5339632,527780778, 71236904519,12635518401687,2857729962091681, 804340796768258860,276170316701087964628, 113757566198465278521124, 55424247710747076665462268, 31554099393732823158673973698] |