n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 20 |
4 | 64 |
5 | 200 |
6 | 686 |
7 | 2324 |
8 | 8194 |
9 | 29084 |
10 | 104860 |
11 | 381116 |
12 | 1398148 |
13 | 5161592 |
14 | 19173958 |
15 | 71580752 |
16 | 268435474 |
17 | 1010572832 |
18 | 3817749138 |
19 | 14467230668 |
20 | 54975581488 |
21 | 209430687944 |
22 | 799644820114 |
23 | 3059510251700 |
24 | 11728124035248 |
[1,2,7,20,64,200,686,2324,8194,29084,104860, 381116,1398148,5161592,19173958,71580752, 268435474,1010572832,3817749138,14467230668, 54975581488,209430687944,799644820114, 3059510251700,11728124035248] |