n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 21 |
3 | 81 |
4 | 297 |
5 | 1037 |
6 | 4417 |
7 | 17413 |
8 | 67973 |
9 | 267397 |
10 | 1059461 |
11 | 4216453 |
12 | 16821893 |
13 | 67198597 |
14 | 268615301 |
15 | 1074101893 |
[1,5,21,81,297,1037,4417,17413,67973,267397, 1059461,4216453,16821893,67198597,268615301, 1074101893] |