n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 31 |
3 | 301 |
4 | 3274 |
5 | 38158 |
6 | 465919 |
7 | 5883040 |
8 | 76189177 |
9 | 1006440238 |
10 | 13508178448 |
11 | 183689450959 |
12 | 2525336086630 |
13 | 35041483528522 |
14 | 490125130328455 |
15 | 6902993856515389 |
16 | 97814486474787898 |
17 | 1393470813699724726 |
18 | 19946461692566594413 |
19 | 286742046721454817358 |
20 | 4138001844031453456120 |
[1,4,31,301,3274,38158,465919,5883040,76189177, 1006440238,13508178448,183689450959,2525336086630, 35041483528522,490125130328455,6902993856515389, 97814486474787898,1393470813699724726, 19946461692566594413,286742046721454817358, 4138001844031453456120] |