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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 25 |
| 3 | 32 |
| 4 | 1426 |
| 5 | 8120 |
| 6 | 212926 |
| 7 | 2175992 |
| 8 | 45081311 |
| 9 | 628801280 |
| 10 | 11112714624 |
| 11 | 173179768136 |
| 12 | 2908344290540 |
| 13 | 46894928400912 |
| 14 | 774211745673930 |
| 15 | 12617601589397384 |
| 16 | 207178457948099771 |
| 17 | 3387766419366893632 |
| 18 | 55527737283695335309 |
| 19 | 908939402189646871904 |
[1,0,25,32,1426,8120,212926,2175992,45081311, 628801280,11112714624,173179768136,2908344290540, 46894928400912,774211745673930,12617601589397384, 207178457948099771,3387766419366893632, 55527737283695335309,908939402189646871904] |