n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 48 |
8 | 114 |
9 | 282 |
10 | 701 |
11 | 1763 |
12 | 4438 |
13 | 11212 |
14 | 28287 |
15 | 71357 |
16 | 179696 |
17 | 451946 |
18 | 1134720 |
19 | 2844954 |
20 | 7122041 |
21 | 17805884 |
22 | 44459523 |
23 | 110882964 |
24 | 276241029 |
25 | 687501846 |
26 | 1709406423 |
27 | 4246490811 |
28 | 10540185493 |
29 | 26140852721 |
30 | 64782959403 |
[1,1,1,2,4,9,20,48,114,282,701,1763,4438,11212, 28287,71357,179696,451946,1134720,2844954,7122041, 17805884,44459523,110882964,276241029,687501846, 1709406423,4246490811,10540185493,26140852721, 64782959403] |