n | a(n) |
---|---|
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 49 |
7 | 169 |
8 | 602 |
9 | 2191 |
10 | 8095 |
11 | 30239 |
12 | 113906 |
13 | 431886 |
14 | 1646177 |
15 | 6301715 |
16 | 24210652 |
17 | 93299841 |
18 | 360490592 |
19 | 1396030396 |
20 | 5417028610 |
21 | 21056764914 |
22 | 81978913225 |
23 | 319610939055 |
24 | 1247641114021 |
25 | 4875896455975 |
26 | 19075294462185 |
27 | 74696636715792 |
28 | 292758662041150 |
[1,2,5,15,49,169,602,2191,8095,30239,113906, 431886,1646177,6301715,24210652,93299841, 360490592,1396030396,5417028610,21056764914, 81978913225,319610939055,1247641114021, 4875896455975,19075294462185,74696636715792, 292758662041150] |