n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 15 |
7 | 36 |
8 | 87 |
9 | 234 |
10 | 645 |
11 | 1782 |
12 | 4893 |
13 | 13608 |
14 | 37994 |
15 | 106434 |
16 | 299025 |
17 | 844182 |
18 | 2391723 |
19 | 6797196 |
20 | 19369708 |
21 | 55342972 |
22 | 158486625 |
23 | 454795398 |
24 | 1307534319 |
25 | 3765720066 |
26 | 10862688116 |
27 | 31381118658 |
28 | 90780960426 |
29 | 262951692390 |
[0,1,2,3,6,15,36,87,234,645,1782,4893,13608,37994, 106434,299025,844182,2391723,6797196,19369708, 55342972,158486625,454795398,1307534319, 3765720066,10862688116,31381118658,90780960426, 262951692390] |