n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 47 |
8 | 109 |
9 | 258 |
10 | 609 |
11 | 1447 |
12 | 3434 |
13 | 8175 |
14 | 19449 |
15 | 46327 |
16 | 110330 |
17 | 262882 |
18 | 626317 |
19 | 1492515 |
20 | 3556540 |
21 | 8475679 |
22 | 20198343 |
23 | 48136276 |
24 | 114716767 |
25 | 273393363 |
26 | 651550405 |
27 | 1552783297 |
28 | 3700609736 |
29 | 8819356189 |
[1,1,2,4,9,20,47,109,258,609,1447,3434,8175,19449, 46327,110330,262882,626317,1492515,3556540, 8475679,20198343,48136276,114716767,273393363, 651550405,1552783297,3700609736,8819356189] |