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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 112 |
| 4 | 2312 |
| 5 | 1270016 |
| 6 | 292820000 |
| 7 | 1522266730496 |
| 8 | 3772667519238272 |
| 9 | 193509323594243571712 |
| 10 | 5041011532336819845120512 |
| 11 | 2610531939025273190037188509696 |
[1,1,2,112,2312,1270016,292820000,1522266730496, 3772667519238272,193509323594243571712, 5041011532336819845120512, 2610531939025273190037188509696] |