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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 112 |
| 3 | 8608 |
| 4 | 1295104 |
| 5 | 322018816 |
| 6 | 119597651968 |
| 7 | 62037189087232 |
| 8 | 42842215767801856 |
| 9 | 38001850792907505664 |
| 10 | 42106195262186260529152 |
| 11 | 56992583802129636291248128 |
| 12 | 92535374062287540141093289984 |
| 13 | 177509548409832461509746497683456 |
| 14 | 397176345992538727622693418988208128 |
[1,4,112,8608,1295104,322018816,119597651968, 62037189087232,42842215767801856, 38001850792907505664,42106195262186260529152, 56992583802129636291248128, 92535374062287540141093289984, 177509548409832461509746497683456, 397176345992538727622693418988208128] |