n | a(n) |
---|---|
1 | 2 |
2 | 8 |
3 | 18 |
4 | 66 |
5 | 189 |
6 | 209 |
7 | 408 |
8 | 2208 |
9 | 2816 |
10 | 3168 |
11 | 3912 |
12 | 20909 |
13 | 54792 |
14 | 59973 |
15 | 157169 |
16 | 303093 |
17 | 709968 |
18 | 801978 |
19 | 1832496 |
20 | 2145353 |
21 | 2291610 |
22 | 5082306 |
23 | 10829346 |
24 | 16408818 |
[2,8,18,66,189,209,408,2208,2816,3168,3912,20909, 54792,59973,157169,303093,709968,801978,1832496, 2145353,2291610,5082306,10829346,16408818] |