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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 45 |
| 4 | 765 |
| 5 | 25245 |
| 6 | 1640925 |
| 7 | 211679325 |
| 8 | 54401586525 |
| 9 | 27908013887325 |
| 10 | 28605714234508125 |
| 11 | 58613108466507148125 |
| 12 | 240137905387279785868125 |
| 13 | 1967449858837983285617548125 |
| 14 | 32236665937060356134843526028125 |
[1,5,45,765,25245,1640925,211679325,54401586525, 27908013887325,28605714234508125, 58613108466507148125,240137905387279785868125, 1967449858837983285617548125, 32236665937060356134843526028125] |