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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 66 |
| 3 | 21225 |
| 4 | 18952156 |
| 5 | 36175231585 |
| 6 | 126556309395486 |
| 7 | 733064060959310689 |
| 8 | 6540867625730306094360 |
| 9 | 85180334386943946887707617 |
| 10 | 1552697061493449955344530003290 |
| 11 | 38315904135534199560725372265381721 |
| 12 | 1245605749857294018587318829355458646068 |
[1,1,66,21225,18952156,36175231585, 126556309395486,733064060959310689, 6540867625730306094360,85180334386943946887707617, 1552697061493449955344530003290, 38315904135534199560725372265381721, 1245605749857294018587318829355458646068] |