n | a(n) |
---|---|
1 | 4 |
2 | 16 |
3 | 52 |
4 | 1120 |
5 | 13532 |
6 | 798692 |
7 | 31802528 |
8 | 5824262024 |
9 | 752183288216 |
10 | 442761087574020 |
11 | 185196365472026896 |
12 | 352995486371015148824 |
[4,16,52,1120,13532,798692,31802528,5824262024, 752183288216,442761087574020,185196365472026896, 352995486371015148824] |