n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 6 |
4 | 15 |
5 | 64 |
6 | 153 |
7 | 638 |
8 | 1519 |
9 | 6320 |
10 | 15041 |
11 | 62566 |
12 | 148895 |
13 | 619344 |
14 | 1473913 |
15 | 6130878 |
16 | 14590239 |
17 | 60689440 |
18 | 144428481 |
19 | 600763526 |
20 | 1429694575 |
21 | 5946945824 |
22 | 14152517273 |
23 | 58868694718 |
24 | 140095478159 |
25 | 582740001360 |
26 | 1386802264321 |
27 | 5768531318886 |
28 | 13727927165055 |
[0,1,6,15,64,153,638,1519,6320,15041,62566,148895, 619344,1473913,6130878,14590239,60689440, 144428481,600763526,1429694575,5946945824, 14152517273,58868694718,140095478159,582740001360, 1386802264321,5768531318886,13727927165055] |