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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 45 |
| 11 | 1155 |
| 12 | 22275 |
| 13 | 359502 |
| 14 | 5135130 |
| 15 | 67128490 |
| 16 | 820784250 |
| 17 | 9528822303 |
| 18 | 106175395755 |
| 19 | 1144614626805 |
| 20 | 12011282644725 |
| 21 | 123272476465204 |
| 22 | 1241963303533920 |
| 23 | 12320068811796900 |
| 24 | 120622574326072500 |
| 25 | 1167921451092973005 |
| 26 | 11201516780955125625 |
| 27 | 106563273280541795575 |
[1,45,1155,22275,359502,5135130,67128490, 820784250,9528822303,106175395755,1144614626805, 12011282644725,123272476465204,1241963303533920, 12320068811796900,120622574326072500, 1167921451092973005,11201516780955125625, 106563273280541795575] |