n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 8 |
5 | 21 |
6 | 56 |
7 | 149 |
8 | 404 |
9 | 1098 |
10 | 2982 |
11 | 8104 |
12 | 22027 |
13 | 59875 |
14 | 162756 |
15 | 442414 |
16 | 1202605 |
17 | 3269018 |
18 | 8886112 |
19 | 24154954 |
20 | 65659970 |
21 | 178482302 |
22 | 485165196 |
23 | 1318815735 |
24 | 3584912847 |
25 | 9744803447 |
26 | 26489122131 |
27 | 72004899338 |
28 | 195729609430 |
[1,2,4,8,21,56,149,404,1098,2982,8104,22027,59875, 162756,442414,1202605,3269018,8886112,24154954, 65659970,178482302,485165196,1318815735, 3584912847,9744803447,26489122131,72004899338, 195729609430] |