n | a(n) |
---|---|
0 | 4 |
1 | 11 |
2 | 40 |
3 | 149 |
4 | 556 |
5 | 2075 |
6 | 7744 |
7 | 28901 |
8 | 107860 |
9 | 402539 |
10 | 1502296 |
11 | 5606645 |
12 | 20924284 |
13 | 78090491 |
14 | 291437680 |
15 | 1087660229 |
16 | 4059203236 |
17 | 15149152715 |
18 | 56537407624 |
19 | 211000477781 |
20 | 787464503500 |
21 | 2938857536219 |
22 | 10967965641376 |
[4,11,40,149,556,2075,7744,28901,107860,402539, 1502296,5606645,20924284,78090491,291437680, 1087660229,4059203236,15149152715,56537407624, 211000477781,787464503500,2938857536219, 10967965641376] |