n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 8 |
4 | 20 |
5 | 50 |
6 | 125 |
7 | 313 |
8 | 784 |
9 | 1964 |
10 | 4920 |
11 | 12325 |
12 | 30875 |
13 | 77344 |
14 | 193752 |
15 | 485362 |
16 | 1215865 |
17 | 3045825 |
18 | 7630000 |
19 | 19113672 |
20 | 47881056 |
21 | 119945321 |
22 | 300471235 |
23 | 752701000 |
24 | 1885567500 |
25 | 4723475586 |
26 | 11832629493 |
27 | 29641546393 |
28 | 74254101600 |
[1,3,8,20,50,125,313,784,1964,4920,12325,30875, 77344,193752,485362,1215865,3045825,7630000, 19113672,47881056,119945321,300471235,752701000, 1885567500,4723475586,11832629493,29641546393, 74254101600] |