n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 18 |
6 | 43 |
7 | 104 |
8 | 273 |
9 | 702 |
10 | 1870 |
11 | 4985 |
12 | 13562 |
13 | 37038 |
14 | 102266 |
15 | 283774 |
16 | 793189 |
17 | 2227115 |
18 | 6286044 |
19 | 17811751 |
20 | 50672898 |
21 | 144639235 |
22 | 414181050 |
23 | 1189365940 |
24 | 3424477813 |
25 | 9883578364 |
26 | 28589660227 |
27 | 82870288432 |
28 | 240672107114 |
[1,1,2,3,8,18,43,104,273,702,1870,4985,13562, 37038,102266,283774,793189,2227115,6286044, 17811751,50672898,144639235,414181050,1189365940, 3424477813,9883578364,28589660227,82870288432, 240672107114] |