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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 45 |
| 11 | 1650 |
| 12 | 54945 |
| 13 | 1795794 |
| 14 | 59546487 |
| 15 | 2043490735 |
| 16 | 73415619420 |
| 17 | 2779264615127 |
| 18 | 111226656560877 |
| 19 | 4710924208619304 |
| 20 | 211105699482022215 |
| 21 | 9997623229700175712 |
| 22 | 499562336689773070263 |
| 23 | 26288415481415803589236 |
| 24 | 1454007169289989503463230 |
| 25 | 84361156450441837460650255 |
[1,45,1650,54945,1795794,59546487,2043490735, 73415619420,2779264615127,111226656560877, 4710924208619304,211105699482022215, 9997623229700175712,499562336689773070263, 26288415481415803589236,1454007169289989503463230, 84361156450441837460650255] |