n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 43 |
4 | 196 |
5 | 882 |
6 | 3970 |
7 | 17887 |
8 | 80608 |
9 | 363254 |
10 | 1636944 |
11 | 7376591 |
12 | 33241289 |
13 | 149795989 |
14 | 675029164 |
15 | 3041899638 |
16 | 13707783053 |
17 | 61771701389 |
18 | 278363253873 |
19 | 1254394801761 |
20 | 5652708454881 |
21 | 25472931513057 |
22 | 114789263420590 |
23 | 517277526141329 |
24 | 2331019740675071 |
[1,2,9,43,196,882,3970,17887,80608,363254,1636944, 7376591,33241289,149795989,675029164,3041899638, 13707783053,61771701389,278363253873, 1254394801761,5652708454881,25472931513057, 114789263420590,517277526141329,2331019740675071] |