n | a(n) |
---|---|
1 | 4 |
2 | 28 |
3 | 2272 |
4 | 67170304 |
5 | 144115192236605440 |
6 | 1329227995784915891062320757838184448 |
7 | 226156424291633194186662080095093570363541849729447858357132587076662853632 |
[4,28,2272,67170304,144115192236605440, 1329227995784915891062320757838184448, 22615642429163319418666208009509357036354184972944\ 7858357132587076662853632] |