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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 409 |
| 5 | 108388 |
| 6 | 104574902 |
| 7 | 608850350072 |
| 8 | 19464993703121249 |
| 9 | 3058588688924405306744 |
| 10 | 2667688636188332437795588320 |
| 11 | 11779489664021227770290904703308312 |
| 12 | 279652174829276379737422154227421710684110 |
| 13 | 34733463898947150523805900066147780144341745331036 |
[1,1,1,4,409,108388,104574902,608850350072, 19464993703121249,3058588688924405306744, 2667688636188332437795588320, 11779489664021227770290904703308312, 279652174829276379737422154227421710684110, 34733463898947150523805900066147780144341745331036\ ] |