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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 64 |
| 3 | 240 |
| 4 | 900 |
| 5 | 2400 |
| 6 | 6400 |
| 7 | 14000 |
| 8 | 30625 |
| 9 | 58800 |
| 10 | 112896 |
| 11 | 197568 |
| 12 | 345744 |
| 13 | 564480 |
| 14 | 921600 |
| 15 | 1425600 |
| 16 | 2205225 |
| 17 | 3267000 |
| 18 | 4840000 |
| 19 | 6921200 |
| 20 | 9897316 |
| 21 | 13741728 |
| 22 | 19079424 |
| 23 | 25836720 |
| 24 | 34987225 |
| 25 | 46373600 |
| 26 | 61465600 |
| 27 | 79968000 |
| 28 | 104040000 |
[8,64,240,900,2400,6400,14000,30625,58800,112896, 197568,345744,564480,921600,1425600,2205225, 3267000,4840000,6921200,9897316,13741728,19079424, 25836720,34987225,46373600,61465600,79968000, 104040000] |