n | a(n) |
---|---|
2 | 1 |
3 | 22 |
4 | 155 |
5 | 709 |
6 | 2587 |
7 | 8273 |
8 | 24416 |
9 | 68595 |
10 | 187030 |
11 | 500950 |
12 | 1327986 |
13 | 3499982 |
14 | 9195035 |
15 | 24115804 |
16 | 63192397 |
17 | 165512723 |
18 | 433410661 |
19 | 1134800215 |
20 | 2971089810 |
21 | 7778591025 |
22 | 20364830496 |
23 | 53316076892 |
24 | 139583609940 |
25 | 365435000524 |
26 | 956721681957 |
27 | 2504730383698 |
28 | 6557469861231 |
[1,22,155,709,2587,8273,24416,68595,187030,500950, 1327986,3499982,9195035,24115804,63192397, 165512723,433410661,1134800215,2971089810, 7778591025,20364830496,53316076892,139583609940, 365435000524,956721681957,2504730383698, 6557469861231] |