n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 8 |
4 | 21 |
5 | 63 |
6 | 156 |
7 | 371 |
8 | 827 |
9 | 1776 |
10 | 3687 |
11 | 7461 |
12 | 14776 |
13 | 28749 |
14 | 55101 |
15 | 104264 |
16 | 195121 |
17 | 361651 |
18 | 664660 |
19 | 1212431 |
20 | 2196935 |
21 | 3957136 |
22 | 7089331 |
23 | 12638953 |
24 | 22433136 |
25 | 39655993 |
26 | 69841561 |
27 | 122584136 |
28 | 214478637 |
29 | 374166471 |
30 | 650979852 |
[1,1,8,21,63,156,371,827,1776,3687,7461,14776, 28749,55101,104264,195121,361651,664660,1212431, 2196935,3957136,7089331,12638953,22433136, 39655993,69841561,122584136,214478637,374166471, 650979852] |