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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 105 |
| 4 | 1967 |
| 5 | 41265 |
| 6 | 927479 |
| 7 | 21838425 |
| 8 | 531731935 |
| 9 | 13278739425 |
| 10 | 338235642983 |
| 11 | 8753720757705 |
| 12 | 229531493157519 |
| 13 | 6084679071674385 |
| 14 | 162802128960940119 |
| 15 | 4390789738688043705 |
| 16 | 119242319290800424383 |
| 17 | 3258012200816503807425 |
| 18 | 89495966923044854350535 |
| 19 | 2470171286283446551216425 |
[1,7,105,1967,41265,927479,21838425,531731935, 13278739425,338235642983,8753720757705, 229531493157519,6084679071674385, 162802128960940119,4390789738688043705, 119242319290800424383,3258012200816503807425, 89495966923044854350535,2470171286283446551216425] |