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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 254 |
| 4 | 9096 |
| 5 | 443874 |
| 6 | 27487034 |
| 7 | 2065181880 |
| 8 | 182545878152 |
| 9 | 18562391987880 |
| 10 | 2134764133508832 |
| 11 | 273978733525211472 |
| 12 | 38820518588599921200 |
| 13 | 6019219063397716575840 |
| 14 | 1013766602891962529642832 |
| 15 | 184300120562198063868474624 |
| 16 | 35971439241165448281366023424 |
[1,1,11,254,9096,443874,27487034,2065181880, 182545878152,18562391987880,2134764133508832, 273978733525211472,38820518588599921200, 6019219063397716575840,1013766602891962529642832, 184300120562198063868474624, 35971439241165448281366023424] |