n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 20 |
4 | 47 |
5 | 111 |
6 | 252 |
7 | 582 |
8 | 1303 |
9 | 2977 |
10 | 6618 |
11 | 15028 |
12 | 33269 |
13 | 75255 |
14 | 166152 |
15 | 374860 |
16 | 826115 |
17 | 1860407 |
18 | 4094612 |
19 | 9208832 |
20 | 20248703 |
21 | 45495079 |
22 | 99965896 |
23 | 224440544 |
24 | 492900919 |
25 | 1106034259 |
26 | 2428024608 |
27 | 5446009600 |
28 | 11951707547 |
[1,3,8,20,47,111,252,582,1303,2977,6618,15028, 33269,75255,166152,374860,826115,1860407,4094612, 9208832,20248703,45495079,99965896,224440544, 492900919,1106034259,2428024608,5446009600, 11951707547] |