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| n | a(n) |
|---|---|
| 1 | 25056 |
| 2 | 81796 |
| 3 | 142544 |
| 4 | 367236 |
| 5 | 726880 |
| 6 | 1784896 |
| 7 | 3826716 |
| 8 | 9302500 |
| 9 | 21443688 |
| 10 | 53027524 |
| 11 | 129029424 |
| 12 | 325730304 |
| 13 | 820227456 |
| 14 | 2103323044 |
| 15 | 5399925160 |
| 16 | 13983062500 |
| 17 | 36263854752 |
| 18 | 94418540176 |
| 19 | 246096476872 |
| 20 | 642572179236 |
[25056,81796,142544,367236,726880,1784896,3826716, 9302500,21443688,53027524,129029424,325730304, 820227456,2103323044,5399925160,13983062500, 36263854752,94418540176,246096476872,642572179236] |