n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 8 |
3 | 20 |
4 | 52 |
5 | 121 |
6 | 301 |
7 | 675 |
8 | 1628 |
9 | 3570 |
10 | 8426 |
11 | 18202 |
12 | 42288 |
13 | 90374 |
14 | 207464 |
15 | 439800 |
16 | 1000194 |
17 | 2106961 |
18 | 4755715 |
19 | 9967599 |
20 | 22359788 |
21 | 46670273 |
22 | 104154703 |
23 | 216643945 |
24 | 481381746 |
25 | 998346275 |
26 | 2210037191 |
27 | 4571884119 |
28 | 10088030640 |
[1,3,8,20,52,121,301,675,1628,3570,8426,18202, 42288,90374,207464,439800,1000194,2106961,4755715, 9967599,22359788,46670273,104154703,216643945, 481381746,998346275,2210037191,4571884119, 10088030640] |