n | a(n) |
---|---|
5 | 2 |
6 | 3 |
7 | 9 |
8 | 16 |
9 | 39 |
10 | 75 |
11 | 165 |
12 | 318 |
13 | 672 |
14 | 1323 |
15 | 2703 |
16 | 5376 |
17 | 10880 |
18 | 21663 |
19 | 43605 |
20 | 87040 |
21 | 174564 |
22 | 348843 |
23 | 698709 |
24 | 1396680 |
25 | 2795518 |
[2,3,9,16,39,75,165,318,672,1323,2703,5376,10880, 21663,43605,87040,174564,348843,698709,1396680, 2795518] |