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| n | a(n) |
|---|---|
| 6 | 6 |
| 7 | 154 |
| 8 | 2380 |
| 9 | 28975 |
| 10 | 308127 |
| 11 | 3018824 |
| 12 | 28133574 |
| 13 | 254715640 |
| 14 | 2274064881 |
| 15 | 20242054046 |
| 16 | 181155397430 |
| 17 | 1640541610028 |
| 18 | 15107388580258 |
| 19 | 141982420633882 |
| 20 | 1365335004650614 |
| 21 | 13456694682282849 |
| 22 | 136069364339492065 |
| 23 | 1412201447170038064 |
| 24 | 15044059353340996950 |
[6,154,2380,28975,308127,3018824,28133574, 254715640,2274064881,20242054046,181155397430, 1640541610028,15107388580258,141982420633882, 1365335004650614,13456694682282849, 136069364339492065,1412201447170038064, 15044059353340996950] |