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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 112 |
| 4 | 11292 |
| 5 | 740754220 |
| 6 | 361711410384 |
| 7 | 222595582448849152 |
| 8 | 258327454310582805036 |
| 9 | 661821993709898403923269564 |
| 10 | 10266982973657640119698928948136690256 |
| 11 | 34586475747666402744018445215769168804860 |
| 12 | 2847089959666118831608487671650698855934142888811472 |
[2,4,112,11292,740754220,361711410384, 222595582448849152,258327454310582805036, 661821993709898403923269564, 10266982973657640119698928948136690256, 34586475747666402744018445215769168804860, 28470899596661188316084876716506988559341428888114\ 72] |