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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 7 |
| 3 | 112 |
| 4 | 2901 |
| 5 | 104176 |
| 6 | 4788191 |
| 7 | 268323756 |
| 8 | 17744075761 |
| 9 | 1352623086136 |
| 10 | 116780496526515 |
| 11 | 11263219375425172 |
| 12 | 1200239384528276285 |
| 13 | 140044340185131990336 |
| 14 | 17757626485468691645479 |
| 15 | 2431398542489983741458940 |
| 16 | 357522675169127219183137737 |
[0,1,7,112,2901,104176,4788191,268323756, 17744075761,1352623086136,116780496526515, 11263219375425172,1200239384528276285, 140044340185131990336,17757626485468691645479, 2431398542489983741458940, 357522675169127219183137737] |