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| n | a(n) |
|---|---|
| 1 | 28 |
| 2 | 784 |
| 3 | 21952 |
| 4 | 424401 |
| 5 | 8210464 |
| 6 | 151889331 |
| 7 | 2710884810 |
| 8 | 48083827685 |
| 9 | 844714479714 |
| 10 | 14772128520081 |
| 11 | 257802672361640 |
| 12 | 4491710608316816 |
| 13 | 78198928468727304 |
| 14 | 1360792591701114315 |
| 15 | 23673324742422186018 |
[28,784,21952,424401,8210464,151889331,2710884810, 48083827685,844714479714,14772128520081, 257802672361640,4491710608316816, 78198928468727304,1360792591701114315, 23673324742422186018] |